Samsung Galaxy S21 5G vs Xiaomi Poco X6 Pro - Detailed Phone Comparison

Detailed Comparison

Specification

General

Launch Date January 29, 2021 January 12, 2024
Release Year 2021 2024

Physical

Volume 85.33 cm³ 98.98 cm³
Screen Size to Weight Ratio 3.67 "/g 3.59 "/g
Weight 169 g 186 g
Height 151.7 mm 160.5 mm
Width 71.2 mm 74.3 mm
Thickness 7.9 mm 8.3 mm
Foldable Design No No
Available Colors
  • Phantom White
  • Phantom Gray
  • Phantom Violet
  • Phantom Pink
  • Black
  • Yellow
  • Gray

Display

Screen Size 6.2 " 6.67 "
Resolution 1080 x 2400 1220 x 2712
Aspect Ratio 20:9 20:9
Screen-to-Body Ratio 85.9 % 90.1 %
Pixel Density 421 PPI 446 PPI
Refresh Rate 120 Hz 120 Hz
Typical Brightness N/A 500 nits
HBM Brightness N/A 1200 nits
Peak Brightness 1300 nits 1800 nits

Hardware

Battery Capacity per Screen Area 104.06 mAh/in² 112.39 mAh/in²
Battery Density 46.88 mAh/cm³ 50.52 mAh/cm³
Battery Capacity 4000 mAh 5000 mAh
NFC Support Yes Yes
Chipset Exynos 2100 (5 nm) - International Mediatek Dimensity 8300 Ultra (4 nm)
CPU Octa-core (1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55) - International Octa-core (1x3.35 GHz Cortex-A715 & 3x3.20 GHz Cortex-A715 & 4x2.20 GHz Cortex-A510)
GPU Mali-G78 MP14 - International Mali G615-MC6

Connectivity

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

Software

Operating System Android Android
Initial OS Version 11 14
Maximum OS Version 15 17

Comparison Summary

1. Specifications Comparison

FeatureSamsung Galaxy S21 5GXiaomi Poco X6 ProPractical Impact
Design
Launch Date2021-01-292024-01-12The Poco X6 Pro is significantly newer, likely with more up-to-date software and features.
Dimensions151.7 × 71.2 × 7.9 mm160.5 × 74.3 × 8.3 mmThe S21 is more compact and pocketable, while the Poco X6 Pro is larger and may feel less comfortable in smaller hands.
Weight169g186gThe S21 is noticeably lighter, making it more comfortable for prolonged use.
Display
Size6.2"6.67"The Poco X6 Pro offers a larger display, better for media consumption and gaming.
Resolution1080x24001220x2712The Poco X6 Pro has a sharper and more detailed display.
Pixel Density (PPI)421446The Poco X6 Pro offers slightly sharper visuals, although both are very sharp.
TechnologyAMOLEDAMOLEDBoth have vibrant and high-contrast displays.
Refresh Rate120Hz120HzBoth offer smooth scrolling and animations.
Brightness1300 nits1800 nitsThe Poco X6 Pro is significantly brighter, offering better visibility in direct sunlight.
Performance
ChipsetExynos 2100 (5 nm)Mediatek Dimensity 8300 Ultra (4 nm)The Poco X6 Pro has a newer and more powerful chipset, resulting in better performance and efficiency.
AnTuTu Score749,1001,479,279The Poco X6 Pro has significantly higher performance, ideal for demanding applications, and gaming.
GPUMali-G78 MP14Mali G615-MC6The Poco X6 Pro's GPU is better for gaming and graphics-intensive tasks.
Battery
Capacity4000mAh5000mAhThe Poco X6 Pro has a larger battery, offering longer battery life between charges.
Charging25W Fast Charging67W Fast ChargingThe Poco X6 Pro charges much faster than the S21.
FeaturesReverse, Wireless 15W, Reverse Wireless 4.5WXiaomi P2, G1 chipS21 offers versatile charging but lacks a charger in box; Poco X6 Pro offers intelligent charging but lacks wireless charging.
Camera
Main Camera Resolution12MP64MPThe Poco X6 Pro captures images with much higher detail, although the S21 has a larger sensor.
Main Camera Aperturef/1.8f/1.7The Poco X6 Pro has a slightly wider aperture, performing better in low light situations.
Main Camera Sensor Size1/1.76"1/2"The S21 has a larger sensor, capturing better light and dynamic range.
Telephoto/PortraitYesNoS21 has a dedicated telephoto lens for better zoom and portrait photos.
Selfie Camera Resolution10MP16MPThe Poco X6 Pro captures more detailed selfies.
Selfie Camera Aperturef/2.2f/2.4The S21 performs slightly better in low light for selfies, due to wider aperture.
Selfie Camera Sensor Size1/3.2"1/3.06"Poco X6 Pro has a slightly larger sensor for selfies.
Wide Angle LensNoYes (8MP)The Poco X6 Pro allows for wide-angle shots.
Macro LensNoYes (2MP)The Poco X6 Pro has a dedicated macro lens for close-up photography.
Wide Angle + Macro CameraYes (12.2MP)NoS21 has a dedicated wide-angle + macro lens.
VideoUp to 8K@24fpsUp to 4K@30fpsS21 has better video capabilities, including 8k recording and 960fps slow motion.
DxOMark (Mobile)111Not AvailableS21 has a tested and validated camera performance, though Poco X6 Pro lacks testing
DxOMark (Selfie)132Not AvailableS21 has a tested and validated selfie camera performance, though Poco X6 Pro lacks testing
Features8K Video, Optical ZoomFlicker sensor, Noise reductionS21 offers optical zoom and 8k recording, Poco X6 offers flicker reduction and noise reduction
Software
OSAndroid 11Android 14The Poco X6 Pro has a much newer OS with additional features and security improvements.
Max OS Version1517The Poco X6 Pro will receive more OS updates over its lifetime.
Connectivity
WiFiWiFi 6WiFi 6, MiMOBoth offer fast Wi-Fi speeds; Poco X6 Pro includes MiMO for a stronger connection
Bluetooth5.05.4The Poco X6 Pro has a newer, faster, and more energy-efficient Bluetooth version.
GPSGPS, A-GPS, GLONASS, Beidou, Galileo, GPS (L1+L5), Galileo (E1+E5a)GPS, A-GPS, GLONASS, Beidou, QZSS, Galileo, GLONASS (L1), BeiDou (B1), NavICPoco X6 Pro has more satellite systems for improved accuracy and reliability.
SIMDual SIMDual SIMBoth offer dual SIM support.
Storage
Internal Storage128/256GB256/512GBThe Poco X6 Pro offers higher storage capacity for more files, apps and media.
RAM8GB8/12GBThe Poco X6 Pro offers more RAM, allowing for smoother multitasking and better app performance.
Expandable StorageNoNoNeither phone offers expandable storage.
Audio
Audio QualityDolby Atmos, Noise cancellation microphoneDolby Atmos, Hi-Res AudioPoco X6 Pro offers Hi-Res audio for better quality, S21 offers noise cancellation for better audio calls.
Security
FeaturesFingerprint sensorFingerprint sensorBoth phones have basic fingerprint security.
Build Quality
Screen ProtectionGorilla Glass VictusGorilla Glass 5S21 uses a more durable screen protection, reducing chances of scratches and cracks.
Sensors
SensorsBiometric: Fingerprint; Proximity: Proximity; Motion: Accelerometer, Compass, Gyroscope; Environmental: BarometerBiometric: Fingerprint; Motion: Accelerometer, Compass, Gyroscope; Proximity: Ultrasonic proximity virtualS21 has additional sensors for environmental readings while Poco X6 offers more sensors for better functionality in certain scenarios.

2. Key Differences Analysis

Samsung Galaxy S21 5G Advantages:

  • More Compact and Lighter Design: Easier to handle and more pocketable.
  • Telephoto Camera: Offers better zoom capabilities and portrait mode.
  • 8K Video Recording: Ideal for users who need high-resolution video capture.
  • Wireless Charging and Reverse Wireless Charging: Convenient charging options and ability to charge other devices wirelessly.
  • Superior screen protection: Offers better protection against scratches and cracks.
  • More environmental sensors: Offers ability to track barometric pressure which is used for navigation.
  • Validated Camera Performance: DxOMark testing provides objective data on photo and video quality.

Xiaomi Poco X6 Pro Advantages:

  • Newer and More Powerful Chipset: Offers significantly better performance for gaming and demanding tasks.
  • Larger and Sharper Display: Better for media consumption, gaming, and viewing content.
  • Significantly Brighter Screen: Improved outdoor visibility.
  • Larger Battery and Faster Charging: Longer battery life and faster charge times.
  • Higher Resolution Main Camera: Captures images with higher detail and potentially better low-light performance.
  • Wide Angle and Macro Lenses: More versatility in photography.
  • Newer Operating System: Provides the latest features, security updates and longer software support.
  • More RAM (Up to 12GB): Better for multitasking and heavy usage.
  • More Storage Options: More storage space to accommodate more media and files.
  • Hi-Res Audio: Provides better quality audio playback.
  • More advanced Bluetooth version: Better and more efficient wireless communication.
  • More advanced GPS systems: Provides better accuracy and reliability.

Trade-offs:

  • The Samsung Galaxy S21 5G offers a more refined camera experience with telephoto capabilities and 8K video, but is significantly less powerful than the Xiaomi Poco X6 Pro
  • The Xiaomi Poco X6 Pro is larger and heavier, which may not be suitable for all users.
  • The Samsung Galaxy S21 5G lacks a macro and wide-angle lens.

3. User Profiles & Recommendations

Samsung Galaxy S21 5G is ideal for:

  • Users who prefer a more compact and lightweight design.
  • Users who need wireless charging and reverse wireless charging.
  • Users who prioritize zoom and portrait photography.
  • Users who require 8K video recording.
  • Users who appreciate a phone with validated camera performance.
  • Users who value better screen protection against scratches and cracks.

Specific Use Cases:

  • Travel Photography: Optical zoom and high-resolution video make it great for capturing memories.
  • Professionals needing portable media: Great for content creators or videographers needing portability for 8K video.
  • Users who prioritize sleek design: The lighter and more compact design makes it easy to handle and carry.

Xiaomi Poco X6 Pro is ideal for:

  • Users who prioritize performance for gaming and heavy multitasking.
  • Users who want a large, bright display for media consumption.
  • Users who need long battery life and fast charging.
  • Users who want a versatile camera system with a wide-angle and macro lens.
  • Users who value having the latest Android OS and software updates.
  • Users who prioritize having large storage space.

Specific Use Cases:

  • Mobile Gamers: The powerful chipset, large display, and fast refresh rate make it excellent for gaming.
  • Media Consumption: The bright and sharp display makes it great for watching videos and browsing social media.
  • Heavy Multitaskers: The higher RAM and powerful processor allow for running many applications at once smoothly.
  • Photography Enthusiasts: The versatile camera system offers more creative flexibility in image capture.
  • Users seeking a high-performance phone at a value: The Poco X6 Pro offers top level specifications with a more affordable price tag.

Price-to-Value: The Xiaomi Poco X6 Pro offers more performance and features for a likely lower price, making it the better value option for most users. The S21 5G is older and may be priced lower, but its price to value is not as competitive.

4. Decision Framework

Key Questions for Buyers:

  1. What are your priorities? Do you prioritize compact design and wireless charging (S21) or performance and battery life (Poco X6 Pro)?
  2. How do you primarily use your phone? Are you a gamer, a photographer, or a casual user?
  3. What is your budget? Are you looking for the best value for your money (Poco X6 Pro), or willing to spend more for specific features (S21)?

Scenario-Based Recommendations:

  • Scenario 1: Power User/Gamer: If you need the absolute best performance for gaming and heavy multitasking, the Xiaomi Poco X6 Pro is the clear winner due to its newer chipset, higher RAM, better cooling, and longer battery life.
  • Scenario 2: Casual User/Media Viewer: If you want a balanced phone that is compact and has a good camera system, the Samsung Galaxy S21 5G is the better option.
  • Scenario 3: Budget Conscious User: If you want to get the best value and need a phone with a good camera system, great performance and long-lasting battery, the Xiaomi Poco X6 Pro is a great option.
  • Scenario 4: User focused on photography: If you value telephoto and 8K video, the Samsung Galaxy S21 5G is the more suitable option.

My Choice:

I would choose the Xiaomi Poco X6 Pro. The main reason is that it provides significantly better performance due to its superior chipset and higher RAM. In addition, I also value long battery life, fast charging, and the versatile camera system with wide-angle and macro lens capabilities. While the Samsung Galaxy S21 has its advantages in terms of a more compact design, 8K video recording and telephoto camera, its performance is much lower when compared with the Poco X6 Pro. The Poco X6 Pro's larger, brighter screen is also a significant advantage for media consumption and gaming, which are the main things I would use a phone for. Finally, considering the price point of both phones, the Poco X6 Pro provides far more value and modern features, making it the ideal choice.

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.