Samsung Galaxy S21+ 5G vs Xiaomi Poco M3 Pro 5G - Detailed Phone Comparison

Detailed Comparison

Specification

General

Launch Date January 29, 2021 May 22, 2021
Release Year 2021 2021

Physical

Volume 95.23 cm³ 108.43 cm³
Screen Size to Weight Ratio 3.35 "/g 3.42 "/g
Weight 200 g 190 g
Height 161.5 mm 161.8 mm
Width 75.6 mm 75.3 mm
Thickness 7.8 mm 8.9 mm
Foldable Design No No
Available Colors
  • Phantom Violet
  • Phantom Pink
  • Phantom Black
  • Phantom Silver
  • Phantom Gold
  • Phantom Red
  • Cool Blue
  • Poco Yellow
  • Power Black

Display

Screen Size 6.7 " 6.5 "
Resolution 1080 x 2400 1080 x 2400
Aspect Ratio 20:9 20:9
Screen-to-Body Ratio 88.8 % 83.7 %
Pixel Density 394 PPI 405 PPI
Refresh Rate 120 Hz 90 Hz
Typical Brightness N/A 400 nits
HBM Brightness N/A 500 nits
Peak Brightness 1300 nits N/A

Hardware

Battery Capacity per Screen Area 106.93 mAh/in² 118.34 mAh/in²
Battery Density 50.4 mAh/cm³ 46.11 mAh/cm³
Battery Capacity 4800 mAh 5000 mAh
NFC Support Yes Yes
Chipset Exynos 2100 (5 nm) - International Mediatek Dimensity 700 (7 nm)
CPU Octa-core (1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55) - International Octa-core (2x2.2 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55)
GPU Mali-G78 MP14 - International Mali-G57 MC2

Connectivity

USB Version 3.2 2.0
OTG Support 1
DisplayPort
DisplayPort Version N/A N/A
USB Features USB Type-C 3.2, OTG USB Type-C 2.0

Software

Operating System Android Android
Initial OS Version 11 11
Maximum OS Version 15

Comparison Summary

1. Specifications Comparison

Here's a detailed comparison of the Samsung Galaxy S21+ 5G and Xiaomi Poco M3 Pro 5G, focusing on practical implications:

Design

FeatureSamsung Galaxy S21+ 5GXiaomi Poco M3 Pro 5GPractical Impact
Dimensions161.5 x 75.6 x 7.8 mm161.8 x 75.3 x 8.9 mmThe Poco M3 Pro is slightly thicker (1.1mm), potentially less comfortable to hold for some users, but the difference is minor.
Weight200g190gThe Poco M3 Pro is slightly lighter (10g), making it a bit easier to handle, especially during extended usage.
BuildGorilla Glass VictusGorilla Glass 3The S21+ offers significantly better screen protection against scratches and drops, leading to greater device longevity.

Display

FeatureSamsung Galaxy S21+ 5GXiaomi Poco M3 Pro 5GPractical Impact
Size6.7"6.5"The S21+ has a slightly larger screen, which is better for media consumption and multi-tasking.
Resolution1080 x 24001080 x 2400Both offer the same clarity for typical smartphone use.
Pixel Density394 PPI405 PPIPractically identical, both displays appear sharp.
TechnologyAMOLEDIPS LCDThe S21+'s AMOLED offers superior contrast, richer colors, and deeper blacks, especially noticeable in dark environments or when viewing HDR content. It also uses less power when displaying dark content.
Refresh Rate120Hz90HzThe S21+ provides smoother scrolling and animations, improving the perceived fluidity of the user interface.
Brightness1300 nits0 nitsThe S21+'s much higher brightness means significantly better visibility outdoors, even in bright sunlight. The Xiaomi's display brightness is not defined, making it likely lower than the S21+.

Performance

FeatureSamsung Galaxy S21+ 5GXiaomi Poco M3 Pro 5GPractical Impact
ChipsetExynos 2100 (5 nm)MediaTek Dimensity 700 (7 nm)The S21+ has a more powerful, energy-efficient chipset. This leads to faster app loading, smoother multitasking, and better gaming performance.
AnTuTu Score749,100379,761The S21+ performs almost twice as fast in benchmark tests. It will handle graphically demanding apps and games more efficiently.
GPUMali-G78 MP14Mali-G57 MC2The S21+ has a considerably more powerful GPU, allowing for better graphics performance in games and other visually intensive applications.

Battery

FeatureSamsung Galaxy S21+ 5GXiaomi Poco M3 Pro 5GPractical Impact
Capacity4800 mAh5000 mAhThe Poco M3 Pro has a slightly larger battery, which can translate to marginally longer usage time on a single charge.
Charging25W Fast Charging18W Fast ChargingThe S21+ charges faster, reducing the time needed to replenish the battery.
Features15W Wireless, 4.5W Reverse Wireless, No in-box chargerReverse ChargingThe S21+ offers more charging flexibility with wireless and reverse wireless options, though you need to purchase a charger separately.

Camera

FeatureSamsung Galaxy S21+ 5GXiaomi Poco M3 Pro 5GPractical Impact
Main Camera12MP, f/1.8, 1/1.76"48MP, f/1.79, 1/2"While the Poco M3 Pro has higher resolution, the S21+'s larger sensor typically leads to better low-light performance and dynamic range.
Telephoto64MP, f/2.0, 1/1.72"NoneThe S21+ offers dedicated zoom capabilities, crucial for capturing distant subjects with good clarity.
Selfie Camera10MP, f/2.2, 1/3.2"8MP, f/2.0, 1/4"The S21+ has higher resolution and a larger sensor, while the Poco has a wider aperture, leading to better low light.
Portrait (Depth)None2MP, f/2.4, 1/5"The Poco M3 Pro has a dedicated sensor for better portrait effects, whereas the S21+ relies on software algorithms.
MacroNone2MP, f/2.4, 1/5"The Poco M3 Pro has a dedicated macro camera, allowing close-up shots.
Wide Angle12.2MP, f/2.2, 1/2.55"NoneThe S21+ has an ultrawide lens for capturing expansive scenes, a versatile tool missing on the Poco.
VideoUp to 8K@24fps1080p@30fpsThe S21+ can record much higher quality video, suitable for professional video creation.
StabilizationOIS & EISEIS onlyThe S21+ has optical stabilization, which reduces shakiness for smoother video and sharper photos.
DxOMark ScoreMobile: 111, Photo: 118, Video: 89Not testedThe S21+'s camera performance is rated significantly higher in independent tests.

Other Features

FeatureSamsung Galaxy S21+ 5GXiaomi Poco M3 Pro 5GPractical Impact
Operating SystemAndroid 11 (upgradeable to 15)Android 11The S21+ has guaranteed software updates to Android 15, extending the lifespan of the device.
WiFiWi-Fi 6Wi-Fi 5The S21+ has a newer WiFi standard for faster speeds, lower latency, and better performance in crowded networks.
BluetoothBluetooth 5.0Bluetooth 5.1The Poco has a newer version of Bluetooth. S21+ has more complete codec and profile support, making it more versatile for audio output and device connectivity.
GPSMore satellite systemsFewer satellite systemsThe S21+ has more accurate positioning and faster GPS lock-on times.
SIMDual SIM + eSIMDual SIMThe S21+ supports eSIM, useful for dual SIM users who want flexibility when switching carriers.
Storage128/256 GB64/128 GBThe S21+ provides more storage options, especially beneficial for users with large media libraries.
RAM8 GB4/6 GBThe S21+ has a better multitasking capacity, and is less likely to experience slowdowns.
Expandable StorageNoNoNeither phone allows for storage expansion.
AudioDolby Atmos, Stereo SpeakersHi-Res AudioThe S21+ offers a more immersive and higher-quality audio experience.
Fingerprint Sensorbasic sensorside-mounted sensorSide-mounted fingerprint sensors tend to be faster and more ergonomically placed for many users.
SensorsBarometerUltrasonic ProximityThe S21+ has a barometer which some users may find useful.

2. Key Differences Analysis

Samsung Galaxy S21+ 5G Advantages:

  • Superior Display: The AMOLED display with 120Hz refresh rate and high brightness offers a much better viewing experience, especially in bright conditions.
  • Higher Performance: The Exynos 2100 chipset provides significantly faster processing speeds, making it better for demanding applications and gaming.
  • More Versatile Camera System: It has a telephoto lens, better overall quality, and more video recording features and capabilities, including 8K.
  • Faster Charging and Wireless Charging: Supports faster 25W charging and includes convenient wireless charging capabilities.
  • Premium Build and Protection: Uses Gorilla Glass Victus, which makes it more resistant to damage.
  • More Software Support: S21+ has guaranteed upgrades up to Android 15.
  • More Audio Options: Dolby Atmos and stereo speakers offer a much better audio experience.
  • More RAM: 8GB of RAM for faster multitasking performance
  • More Storage: 256GB model compared to the 128GB maximum of the Poco.
  • Advanced Connectivity: Faster WiFi and more satellite support for GPS.

Xiaomi Poco M3 Pro 5G Advantages:

  • Slightly Larger Battery: Offers a bit more battery capacity, which might translate to marginally longer usage time.
  • Slightly Lighter: The phone is slightly lighter, improving ergonomics.
  • Macro Lens: Has a dedicated macro lens for close-up photography.
  • Side-Mounted Fingerprint Sensor: Can be considered more ergonomic by some.
  • Lower Price: Typically available at a significantly lower price point, making it a budget-friendly option.

Trade-offs:

  • Samsung Galaxy S21+ 5G: Significantly higher price, no in-box charger.
  • Xiaomi Poco M3 Pro 5G: Less impressive display, slower performance, less versatile camera system, basic charging features.

3. User Profiles & Recommendations

Ideal Users for Samsung Galaxy S21+ 5G:

  • Power Users: Those who need a phone for demanding tasks like gaming, video editing, and heavy multitasking.
  • Media Enthusiasts: Users who prioritize a high-quality display for consuming videos, movies, and photos.
  • Photography Lovers: Those who want a versatile camera system with zoom capabilities, good low-light performance, and advanced video options.
  • Users Requiring Longevity: People looking for a phone that will receive software updates for several years to come.
  • Users Needing Wireless Charging: Those who appreciate the convenience of wireless charging capabilities.

Specific Use Cases:

  • Gaming: The S21+ offers a much better gaming experience due to its powerful processor and higher refresh rate display.
  • Video Editing: Its superior performance and camera capabilities make it suitable for editing videos on the go.
  • Professional Photography: The advanced camera system and its optical zoom provide a much greater range of use for photography enthusiasts.
  • Outdoor Usage: The brighter display makes it much more visible in bright sunlight.

Ideal Users for Xiaomi Poco M3 Pro 5G:

  • Budget-Conscious Users: Those looking for a 5G phone with decent performance at a lower price point.
  • Casual Smartphone Users: People who primarily use their phones for basic tasks like browsing, social media, and casual photography.
  • Users Needing Long Battery Life: Those who prioritize longer battery life over other features.

Specific Use Cases:

  • Daily Commuting: The phone is light and affordable, making it suitable for use while on the move.
  • Social Media: Its camera system is adequate for taking casual photos for social media posting.
  • Basic Gaming: Can handle less demanding games and general browsing without significant issues.

Price-to-Value Ratio:

  • Samsung Galaxy S21+ 5G: Offers a high price-to-value ratio for those who utilize its advanced features fully.
  • Xiaomi Poco M3 Pro 5G: Offers excellent value for its price, providing good basic features and 5G connectivity for budget-conscious users.

4. Decision Framework

Key Questions for Buyers:

  1. What is your budget? The price difference between these phones is significant.
  2. How important are display quality and performance to you? If you prioritize a high-quality visual experience and the ability to run demanding apps, then the S21+ is the clear winner.
  3. What are your primary camera needs? If you often use the camera for zoom photos or creating videos, the S21+ will be a better choice.

Scenario-Based Recommendations:

  • Scenario 1: If you are a gamer or a power user needing the best performance and display, and budget is not the primary concern, choose the Samsung Galaxy S21+ 5G.
  • Scenario 2: If you are on a tight budget, need a 5G phone for everyday use, and don't require high-end features, the Xiaomi Poco M3 Pro 5G is a good option.
  • Scenario 3: If you need an excellent camera with multiple lenses and stabilization features, the Samsung Galaxy S21+ 5G is significantly better.
  • Scenario 4: If a good screen for media is important, the AMOLED panel of the Samsung Galaxy S21+ 5G is significantly better.

My Choice

If I were choosing between these two phones, I would pick the Samsung Galaxy S21+ 5G. Here's why:

  • Superior Display: The AMOLED display with its higher refresh rate and brightness is a significant factor. I value a vibrant and smooth display for both media consumption and daily use, and the S21+ delivers on this better than the Poco M3 Pro.
  • Better Performance: As someone who uses a lot of resource-intensive apps, the Exynos 2100 chipset is essential for a seamless experience. The S21+ handles multitasking and graphics-intensive tasks much more comfortably.
  • Versatile Camera System: I often take a variety of photos and videos, and the S21+'s telephoto and ultrawide lenses, combined with its advanced video recording capabilities, make it far more appealing. Optical image stabilization is crucial for clear shots, especially in low light.
  • Software Support: As a user, the longer software support and guaranteed upgrades up to Android 15 means that the device will be up-to-date and functional for longer.

While the Xiaomi Poco M3 Pro 5G is certainly a good budget option, it falls short in the key areas that matter most to me, making the S21+ a better choice despite its higher price.

Emily Harper
Emily Harper

Technology Insights Specialist

Dedicated technology writer specializing in mobile device analysis and technology communication. Expert at translating complex smartphone features into clear, actionable insights for diverse audiences.

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  • Mobile technology analysis
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Bridging technical complexity with engaging, accessible narratives.