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 85.33 cm³ 108.43 cm³
Screen Size to Weight Ratio 3.67 "/g 3.42 "/g
Weight 169 g 190 g
Height 151.7 mm 161.8 mm
Width 71.2 mm 75.3 mm
Thickness 7.9 mm 8.9 mm
Foldable Design No No
Available Colors
  • Phantom White
  • Phantom Gray
  • Phantom Violet
  • Phantom Pink
  • Cool Blue
  • Poco Yellow
  • Power Black

Display

Screen Size 6.2 " 6.5 "
Resolution 1080 x 2400 1080 x 2400
Aspect Ratio 20:9 20:9
Screen-to-Body Ratio 85.9 % 83.7 %
Pixel Density 421 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 104.06 mAh/in² 118.34 mAh/in²
Battery Density 46.88 mAh/cm³ 46.11 mAh/cm³
Battery Capacity 4000 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

FeatureSamsung Galaxy S21 5GXiaomi Poco M3 Pro 5GPractical Impact
Design
Dimensions151.7 x 71.2 x 7.9 mm161.8 x 75.3 x 8.9 mmS21 is more compact, easier to handle with one hand; M3 Pro is larger and might feel bulkier.
Weight169g190gS21 is noticeably lighter, making it more comfortable for extended use and portability.
Display
Size6.2"6.5"M3 Pro offers slightly more screen real estate, which can be good for media consumption.
Resolution1080x24001080x2400Both offer a sharp and detailed viewing experience.
Pixel Density421 PPI405 PPIBoth displays are similarly sharp.
TechnologyAMOLEDIPS LCDS21 has much better blacks, contrast, and color vibrancy; better viewing in sunlight.
Refresh Rate120Hz90HzS21 offers smoother scrolling and animations.
Brightness1300 nits0 nitsS21 is significantly brighter for outdoor use; M3 Pro brightness information is missing.
Performance
ChipsetExynos 2100 (5 nm)Mediatek Dimensity 700 (7 nm)S21 provides significantly faster app loading, smoother multitasking, and superior gaming performance.
AnTuTu Score749,100379,761S21 has vastly superior performance, suitable for heavy tasks.
GPUMali-G78 MP14Mali-G57 MC2S21's GPU offers better graphics for gaming and intensive tasks.
Battery
Capacity4000mAh5000mAhM3 Pro has a larger battery, potentially offering longer battery life.
Charging25W Fast Charging18W Fast ChargingS21 charges faster, reducing downtime.
Features15W Wireless Charging, 4.5W Reverse Wireless Charging, No Charger In-boxReverse ChargingS21 offers wireless charging and reverse wireless charging capabilities; M3 Pro's primary advantage is potentially longer battery life.
Camera
Standard Camera12MP, f/1.8, 1/1.76"48MP, f/1.79, 1/2"M3 Pro has higher resolution, but S21 has larger pixels and sensor, implying better light capture.
Telephoto Camera64MP, f/2.0, 1/1.72"NoneS21 offers optical zoom capabilities and more versatile photography.
Selfie Camera10MP, f/2.2, 1/3.2"8MP, f/2.0, 1/4"S21 offers higher resolution and larger sensor, while M3 Pro has a slightly wider aperture.
Depth SensorNone2MP, f/2.4, 1/5"M3 Pro includes a dedicated depth sensor for better portrait mode performance.
Macro LensNone2MP, f/2.4, 1/5"M3 Pro includes a dedicated macro lens for close-up photography.
Wide Angle12.2MP, f/2.2, 1/2.55"NoneS21 has a wide-angle lens.
Video Recording8K@24fps, 4K@60fps1080p@30fpsS21 allows high-resolution videos with more advanced stabilization features.
DxOMark Mobile Score111N/AS21's camera is rated higher by DxOMark.
DxOMark Selfie Score132N/AS21's selfie camera is rated higher by DxOMark.
Camera Features4K/8K Video, OIS, Optical Zoom, RAWDigital zoomS21 offers a more comprehensive suite of features.
Software
OSAndroid 11, Max version 15Android 11S21 has a committed support for OS updates compared to the M3 Pro.
Connectivity
WiFiWiFi 6 (802.11ax)WiFi 5 (802.11ac)S21 supports faster and more efficient Wi-Fi.
BluetoothBluetooth 5.0 LEBluetooth 5.1 LEM3 Pro has slightly newer version.
GPSGPS (L1+L5), Galileo (E1+E5a)GPS, GalileoS21 has better accuracy with dual band GPS.
SIMDual SIM Dual StandbyDual SIM Dual StandbyBoth have dual SIM capability.
Storage
Internal128GB/256GB64GB/128GBS21 offers a higher maximum storage option.
RAM8GB4GB/6GBS21 has more RAM for smoother multitasking.
Expandable StorageNoNoNeither phone supports expandable storage.
Audio
QualityDolby Atmos, Stereo SpeakersHi-Res AudioS21 provides a more immersive sound experience; M3 Pro supports Hi-Res Audio.
Security
FeaturesBasic Fingerprint SensorSide-mounted Fingerprint SensorM3 Pro has a faster side-mounted fingerprint sensor.
Build Quality
Screen ProtectionCorning Gorilla Glass VictusCorning Gorilla Glass 3S21 has significantly better screen protection against scratches and drops.
Sensors
SensorsProximity, Accelerometer, Compass, Gyroscope, Barometer, Hall, GeomagneticAccelerometer, Compass, Gyroscope, Ultrasonic proximity virtualS21 has additional sensors useful for advanced features and gaming; M3 Pro has an ultrasonic proximity sensor instead.

2. Key Differences Analysis

Samsung Galaxy S21 5G Advantages:

  • Superior Display: AMOLED with 120Hz refresh rate, much higher brightness, offering vibrant colors, deep blacks, and excellent visibility in sunlight.
  • Significantly Higher Performance: Exynos 2100 chipset, resulting in much faster app loading, smoother multitasking, and better gaming experiences.
  • Advanced Camera System: Telephoto lens with optical zoom, higher video recording quality, optical image stabilization, better DxOMark scores.
  • Premium Features: Wireless charging, reverse wireless charging, and a more comprehensive sensor suite.
  • Better Build Quality: Gorilla Glass Victus offers superior screen protection.
  • More RAM: 8 GB of RAM enhances multitasking capabilities.
  • Better Software Support: Committed OS upgrades.

Xiaomi Poco M3 Pro 5G Advantages:

  • Larger Battery: 5000mAh battery offers the potential for longer battery life.
  • Lower Price Point: Typically more affordable, making it a budget-friendly option.
  • Side-mounted Fingerprint Sensor: Might be preferred by some users.
  • Dedicated Macro and Depth Sensors: Can offer more creative photo options for some users.
  • Slightly Newer Bluetooth Version: Bluetooth 5.1.

Trade-offs:

  • Samsung S21: Higher price, may have shorter battery life, no included charger.
  • Xiaomi M3 Pro: Lower performance, less advanced camera, inferior display, less durable screen.

3. User Profiles & Recommendations

Samsung Galaxy S21 5G:

  • Ideal User: Users who prioritize performance, display quality, and camera capabilities; individuals who often engage in demanding tasks, multimedia consumption, and photography. Also suitable for users who appreciate a premium feel and build.
  • Use Cases:
    • Mobile Gaming: Demanding titles run smoothly with excellent graphics.
    • Professional Photography and Videography: Advanced features and higher video resolution.
    • High-Quality Media Consumption: Vibrant and sharp display.
    • Frequent Multitasking: Smooth performance with 8 GB of RAM.
    • Outdoor Use: High screen brightness.
    • Users in a well defined eco-system and appreciate wireless charging
  • Price-to-Value: High cost, but offers a top-tier experience.

Xiaomi Poco M3 Pro 5G:

  • Ideal User: Budget-conscious users who need a 5G capable smartphone with a large battery and a decent display; individuals who prioritize battery life over raw power.
  • Use Cases:
    • Daily Usage: Social media, messaging, basic app usage.
    • Long Battery Life: Extended use without frequent charging.
    • Casual Photography: Satisfactory image quality for everyday use.
    • Users who prefer a lower price point
  • Price-to-Value: Offers good value for money, especially for those on a budget.

4. Decision Framework

Key Questions for Buyers:

  1. What is your budget? The S21 is a premium device, while the M3 Pro is budget-oriented.
  2. What do you value most? Performance and display quality (S21), or battery life and price (M3 Pro).
  3. What are your primary use cases? Gaming and advanced photography (S21), or general use and long battery (M3 Pro).

Scenario-Based Recommendations:

  • Scenario 1: High Performance and Visuals are Crucial If you're a gamer, avid photographer, or media enthusiast, the Samsung Galaxy S21 5G is the better option.
  • Scenario 2: Budget and Battery Life are Priorities If you're on a tighter budget and need a phone with a long-lasting battery for daily usage, then the Xiaomi Poco M3 Pro 5G is a good choice.
  • Scenario 3: Balanced Usage and Compromise If you need a good balance of features and performance for general daily use, and you do not have a large budget, the M3 Pro is a great option.

My Choice and Explanation

I would choose the Samsung Galaxy S21 5G.

Despite the higher price, the S21 offers a significantly superior overall experience for my needs. The AMOLED display with its 120Hz refresh rate is a major draw, as is the vastly better performance provided by the Exynos 2100 chipset, allowing me to use apps without lag and enjoy a smooth gaming experience. The advanced camera system, particularly the inclusion of a telephoto lens and 8K video recording, is essential for my usage as well, allowing me to explore and test features, in addition to my daily use. While the Xiaomi Poco M3 Pro 5G's larger battery is attractive, the S21's faster charging capabilities, wireless charging, and superior performance outweigh this advantage. Given my preference for a premium experience, the S21's superior build quality with Gorilla Glass Victus adds to its appeal. Overall, while the M3 Pro is a solid budget option, the S21 better fits my needs for a high-performance, high-quality smartphone.

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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