Samsung Galaxy S21 5G vs Xiaomi Poco X4 GT - Detailed Phone Comparison

Detailed Comparison

Specification

General

Launch Date January 29, 2021 June 27, 2022
Release Year 2021 2022

Physical

Volume 85.33 cm³ 108.18 cm³
Screen Size to Weight Ratio 3.67 "/g 3.3 "/g
Weight 169 g 200 g
Height 151.7 mm 163.6 mm
Width 71.2 mm 74.3 mm
Thickness 7.9 mm 8.9 mm
Foldable Design No No
Available Colors
  • Phantom White
  • Phantom Gray
  • Phantom Violet
  • Phantom Pink
  • Silver
  • Black
  • Blue

Display

Screen Size 6.2 " 6.6 "
Resolution 1080 x 2400 1080 x 2460
Aspect Ratio 20:9 21:9
Screen-to-Body Ratio 85.9 % 85.1 %
Pixel Density 421 PPI 407 PPI
Refresh Rate 120 Hz 144 Hz
Typical Brightness N/A 500 nits
HBM Brightness N/A 650 nits
Peak Brightness 1300 nits N/A

Hardware

Battery Capacity per Screen Area 104.06 mAh/in² 116.62 mAh/in²
Battery Density 46.88 mAh/cm³ 46.96 mAh/cm³
Battery Capacity 4000 mAh 5080 mAh
NFC Support Yes Yes
Chipset Exynos 2100 (5 nm) - International Mediatek Dimensity 8100 (5 nm)
CPU Octa-core (1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55) - International Octa-core (4x2.85 GHz Cortex-A78 & 4x2.0 GHz Cortex-A55)
GPU Mali-G78 MP14 - International Mali-G610 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 12
Maximum OS Version 15

Comparison Summary

Smartphone Comparison: Samsung Galaxy S21 5G vs. Xiaomi Poco X4 GT

1. Specifications Comparison

Here's a detailed comparison of the key specifications of the Samsung Galaxy S21 5G and the Xiaomi Poco X4 GT, along with their practical implications:

Design

FeatureSamsung Galaxy S21 5GXiaomi Poco X4 GTPractical Impact
Dimensions151.7 × 71.2 × 7.9 mm163.6 × 74.3 × 8.9 mmPoco X4 GT is larger & bulkier, potentially less comfortable for one-handed use but offers more screen real estate.
Weight169g200gS21 5G is significantly lighter, making it more comfortable to hold for extended periods.
BuildStandardStandardBoth phones are standard (non-foldable) smartphones.

Display

FeatureSamsung Galaxy S21 5GXiaomi Poco X4 GTPractical Impact
Size6.2"6.6"Poco X4 GT provides a more immersive viewing experience due to the larger screen size.
Resolution1080x24001080x2460Both offer sharp displays, differences in pixel density are negligible to the human eye.
PPI421407Both have very similar pixel density.
TechnologyAMOLEDIPS LCDS21 5G's AMOLED offers richer colors, deeper blacks, and better power efficiency with dark mode.
Refresh Rate120Hz144HzPoco X4 GT offers slightly smoother scrolling and animations.
Brightness1300 nits0 nitsS21 5G is much better for outdoor visibility in bright conditions; brightness for Poco X4 GT is not specified.

Performance

FeatureSamsung Galaxy S21 5GXiaomi Poco X4 GTPractical Impact
ChipsetExynos 2100 (5 nm) - InternationalMediatek Dimensity 8100 (5 nm)Different chipsets; Poco X4 GT has a newer chipset, which translates to better raw performance and efficiency
Antutu Score749,100820,061Poco X4 GT scores higher in benchmarks, suggesting better overall performance for demanding apps and games.
GPUMali-G78 MP14 - International (ARM Mali-G78 MC14)Mali-G610 MC6 (Mali-G610 MC6)Different GPU configurations with slight performance differences.

Camera

FeatureSamsung Galaxy S21 5GXiaomi Poco X4 GTPractical Impact
Standard Lens12MP, f/1.8, 1/1.76" Sony IMX555, 1.80µm pixels64MP, f/1.89, 1/1.72" Samsung Bright S5KGW1, 0.80µm pixelsPoco X4 GT has higher resolution, but S21 5G has a wider aperture and larger pixels for better low-light performance.
Telephoto + Portrait64MP, f/2.0, 1/1.72" Samsung Bright S5KGW2, 0.80µm pixelsNot AvailableS21 5G has a dedicated telephoto lens for better zoom capabilities and portrait shots.
Selfie Lens10MP, f/2.2, 1/3.2" Sony IMX374, 1.22µm pixels16MP, f/2.45, 1/3.06" Omnivision OV16A10, 1.00µm pixelsPoco X4 GT has higher resolution for selfies. S21 5G has a wider aperture.
Wide Angle LensNot Available8MP, f/2.2, sensor model unknown, pixel size unknownPoco X4 GT offers an ultrawide lens for landscape and group shots.
Macro LensNot Available2MP, f/2.4, 1/5" Omnivision OV02B10, 1.75µm pixelsPoco X4 GT has a dedicated macro lens for close-up shots.
Wide Angle + Macro12.2MP, f/2.2, 1/2.55" Sony IMX563, 1.40µm pixelsNot AvailableS21 5G has a dedicated wide angle + macro lens, offering better versatility in shooting scenarios.
Video RecordingUp to 8K@24fpsUp to 4K@30fpsS21 5G can record higher resolution videos; ideal for professional or enthusiast video creation.
Video StabilizationYesNoSamsung Galaxy S21 5G offers better video stabilization.
DXoMarkMobile: Main score 111, Photo score 118, Video score 90; Selfie: Main score 132, Photo score 125, Video score 145Not AvailableS21 5G has reputable scores indicating better overall camera performance.

Battery

FeatureSamsung Galaxy S21 5GXiaomi Poco X4 GTPractical Impact
Capacity4000mAh5080mAhPoco X4 GT offers significantly better battery life due to its larger capacity.
Charging25W Fast Charging67W Fast ChargingPoco X4 GT charges much faster, reducing downtime significantly.
FeaturesWireless Charging, Reverse Charging, No Charger in-boxNoneS21 5G offers more charging convenience; lack of charger in-box is a downside.

Other

FeatureSamsung Galaxy S21 5GXiaomi Poco X4 GTPractical Impact
Operating SystemAndroid 11, upgradable to 15Android 12Poco X4 GT has newer Android version out of the box. S21 5G has OS upgrade potential.
WiFiWiFi 6WiFi 6, Wi-Fi MiMOSimilar WiFi capabilities, Xiaomi Poco X4 GT has Wi-Fi MiMO for better signal strength and stability.
Bluetooth5.0 LE5.3 LEPoco X4 GT has a newer Bluetooth version, offering better range and performance, it offers other codecs like LDAC, AAC.
GPSGPS (L1+L5), Galileo (E1+E5a)A-GPS, GLONASS, Beidou, QZSS, Galileo, GPS (L1+L5), GLONASS (L1), BeiDou (B1)Poco X4 GT supports more satellite systems for improved location accuracy and reliability.
Storage128 GB or 256 GB128 GB or 256 GBBoth offer similar storage options.
RAM8 GB8 GBBoth are good for multitasking and gaming.
Expandable StorageNoNoNeither phone allows expandable storage.
AudioDolby Atmos, Noise cancellation microphone, Stereo SpeakersDolby Atmos, Hi-Res Audio, Stereo Speakers, 2 microphonesXiaomi Poco X4 GT audio features a slight edge (Hi-Res audio, improved voice capture).
SecurityBasic fingerprint sensorSide-mounted fingerprint sensorPoco X4 GT offers a potentially faster and more convenient unlocking experience.
Screen ProtectionCorning Gorilla Glass VictusCorning Gorilla Glass 5S21 5G has superior screen protection for better scratch and damage resistance.
SensorsBiometric: Fingerprint; Proximity: Proximity; Motion: Accelerometer, Compass, Gyroscope; Environmental: Barometer, Hall, GeomagneticBiometric: Fingerprint; Motion: Accelerometer, Compass, Gyroscope; Proximity: Ultrasonic proximity virtual, RGBS21 5G includes more sensors which may be useful for specific applications; Xiaomi Poco X4 GT has some unique sensors like RGB and Ultrasonic proximity.

2. Key Differences Analysis

Samsung Galaxy S21 5G Advantages:

  • Superior Display: AMOLED technology offers better visual quality with deeper blacks, higher contrast, and vibrant colors. It's also significantly brighter, making it much better for outdoor visibility.
  • Advanced Camera Features: Offers a dedicated telephoto lens, 8K video recording, optical zoom, and optical image stabilization (OIS). It also has better scored camera tests according to DxOMark.
  • Wireless Charging: Provides convenient wireless charging and reverse wireless charging capabilities.
  • Premium Build Quality: Uses Corning Gorilla Glass Victus for superior screen protection.
  • More Sensors: includes more sensors including an environmental sensor, useful for specific applications.

    Practical Implications: Ideal for users who prioritize display quality, advanced camera capabilities (including zoom), wireless charging, and premium build quality.

Xiaomi Poco X4 GT Advantages:

  • Larger Display: 6.6" screen offers a more immersive viewing experience.
  • Higher Refresh Rate: 144Hz refresh rate provides slightly smoother animations and scrolling.
  • Better Performance: The newer Mediatek Dimensity 8100 chipset offers slightly better benchmark scores.
  • Significantly Larger Battery: 5080mAh battery offers much longer battery life, which is a key advantage.
  • Faster Charging: 67W fast charging significantly reduces charging times.
  • Newer Bluetooth version: Has newer bluetooth version 5.3 with other codecs like LDAC and AAC.
  • Better GPS: Supports more satellite systems.
  • Side-mounted Fingerprint Sensor: More advanced and convenient fingerprint unlock.

    Practical Implications: Suitable for users who value a larger display, longer battery life, faster charging, gaming performance, and slightly better connectivity.

Significant Trade-Offs:

  • S21 5G: Loses out on battery life and charging speed compared to Poco X4 GT. Lacks a wide-angle and macro camera.
  • Poco X4 GT: Sacrifices display quality (IPS LCD vs AMOLED), premium camera features (optical zoom, OIS) and wireless charging, as well as screen brightness. It has a larger size and is heavier, making it less pocketable than the S21.

3. User Profiles & Recommendations

Samsung Galaxy S21 5G Ideal Users:

  • Content Consumers: Users who value a vibrant and sharp display for watching videos and browsing.
  • Photography Enthusiasts: Users who want a versatile camera system with zoom capabilities, optical image stabilization, and advanced video features like 8K recording.
  • Power Users: Those who need wireless charging and a premium build.
  • Users who prioritize premium build quality and more features.

    Use Cases: Watching high-definition content, capturing detailed photographs in various scenarios (including zoomed shots), creating professional-grade video content, and daily use in bright outdoor conditions.

Xiaomi Poco X4 GT Ideal Users:

  • Gamers: Users who prioritize a high refresh rate and excellent gaming performance.
  • Heavy Users: Users who need long battery life and fast charging.
  • Budget-Conscious Users: Users who want a high-performing device without breaking the bank.
  • Users who want a big screen and slightly better connectivity.

    Use Cases: Mobile gaming, extensive social media use, long days away from a power source, and users who prefer larger screens.

4. Decision Framework

Here are three key questions a buyer should consider:

  1. Display Preference: Do you prioritize an AMOLED display with vibrant colors and high brightness (Samsung S21 5G), or a larger display with a higher refresh rate (Poco X4 GT)?
  2. Battery and Charging: Is longer battery life and faster charging more important, or are wireless charging convenience and other features like reverse wireless charging your priority?
  3. Camera Priorities: Do you need advanced camera features like optical zoom and OIS (Samsung S21 5G), or would a more simple camera setup be sufficient (Poco X4 GT), or do you need a wide-angle and macro lens (Poco X4 GT)

Scenario-Based Recommendations:

  • For the Mobile Photographer: The Samsung Galaxy S21 5G is the better choice due to its advanced camera system, and reputable DxOMark scores.
  • For the Mobile Gamer: The Xiaomi Poco X4 GT is preferable because of its higher refresh rate, newer chipset for better gaming performance and significantly better battery life.
  • For the Average User: Consider your priorities regarding display, battery, and camera. The Samsung S21 is the all-rounder, whereas the Poco X4 GT is for people who prioritize gaming performance, battery life and speed.

My Choice

If I were choosing between these two phones, I would choose the Samsung Galaxy S21 5G.

Here's why:

While the Poco X4 GT has undeniable strengths in battery life, charging speed, and raw gaming performance, my personal preference leans towards the more premium user experience offered by the S21 5G. I highly value display quality, and the AMOLED panel with its higher brightness is a significant advantage for me. I also often use my phone for photography, and the additional features like optical zoom, OIS and 8K video recording are very important to me, which are missing on the Poco X4 GT. Wireless charging is also a very convenient feature. I also prefer the more premium build quality and more compact form factor of the S21. While the battery is smaller, for my usage, it is usually sufficient, and I can top it up easily with a charger.

The Poco X4 GT is an excellent device, but it is built with more budget conscious user in mind. For me, the S21 5G offers a more well-rounded and enjoyable experience that aligns better with my priorities and use case.

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.

Key Strengths:

  • Mobile technology analysis
  • Digital media communication
  • Technical storytelling
  • User-centric technology insights

Bridging technical complexity with engaging, accessible narratives.