Xiaomi Poco X3 Pro vs Samsung Galaxy S21 FE 5G - Detailed Phone Comparison

Detailed Comparison

Specification

General

Launch Date March 24, 2021 January 7, 2022
Release Year 2021 2022

Physical

Volume 119.33 cm³ 91.64 cm³
Screen Size to Weight Ratio 3.1 "/g 3.62 "/g
Weight 215 g 177 g
Height 165.3 mm 155.7 mm
Width 76.8 mm 74.5 mm
Thickness 9.4 mm 7.9 mm
Foldable Design No No
Available Colors
  • Phantom Black
  • Frost Blue
  • Metal Bronze
  • White
  • Graphite
  • Lavender
  • Olive

Display

Screen Size 6.67 " 6.4 "
Resolution 1080 x 2400 1080 x 2340
Aspect Ratio 20:9 19.5:9
Screen-to-Body Ratio 84.6 % 86.7 %
Pixel Density 395 PPI 403 PPI
Refresh Rate 120 Hz 120 Hz
Typical Brightness 450 nits N/A
HBM Brightness N/A N/A
Peak Brightness N/A N/A

Hardware

Battery Capacity per Screen Area 115.98 mAh/in² 109.86 mAh/in²
Battery Density 43.24 mAh/cm³ 49.11 mAh/cm³
Battery Capacity 5160 mAh 4500 mAh
NFC Support Yes Yes
Chipset Qualcomm Snapdragon 860 (7 nm) Qualcomm SM8350 Snapdragon 888 5G (5 nm) - Version 1
CPU Octa-core (1x2.96 GHz Kryo 485 Gold & 3x2.42 GHz Kryo 485 Gold & 4x1.78 GHz Kryo 485 Silver) Octa-core (1x2.84 GHz Cortex-X1 & 3x2.42 GHz Cortex-A78 & 4x1.80 GHz Cortex-A55) - Version 1
GPU Adreno 640 Adreno 660 - Version 1

Connectivity

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

Software

Operating System Android Android
Initial OS Version 11 12
Maximum OS Version 12 16

Comparison Summary

Smartphone Comparison: Xiaomi Poco X3 Pro vs. Samsung Galaxy S21 FE 5G

1. Specifications Comparison

Design

FeatureXiaomi Poco X3 ProSamsung Galaxy S21 FE 5GPractical Impact
Dimensions165.3 × 76.8 × 9.4 mm155.7 × 74.5 × 7.9 mmS21 FE 5G is more compact and easier to handle, while X3 Pro is bulkier.
Weight215g177gS21 FE 5G is significantly lighter, making it more comfortable for extended use and less tiring to carry around.

Display

FeatureXiaomi Poco X3 ProSamsung Galaxy S21 FE 5GPractical Impact
Size6.67"6.4"X3 Pro offers a slightly larger screen for a more immersive experience. S21 FE 5G is more compact and easier for one-handed use, however.
Resolution1080x24001080x2340Both offer similar sharpness, with negligible difference in detail.
PPI395403Similar pixel density; both displays offer clear images.
TechnologyIPS LCDAMOLEDS21 FE 5G's AMOLED display provides richer colors, deeper blacks, higher contrast, better viewing angles, and improved battery efficiency in dark mode.
Refresh Rate120Hz120HzBoth offer smooth scrolling and animation, which is great for gaming and general responsiveness.
Brightness0 nits1300 nitsS21 FE 5G is much brighter, offering significantly improved outdoor visibility in bright conditions. The X3 Pro is hard to see in sunlight.

Performance

FeatureXiaomi Poco X3 ProSamsung Galaxy S21 FE 5GPractical Impact
ChipsetSnapdragon 860 (7 nm)Snapdragon 888 5G (5 nm)S21 FE 5G offers superior performance for demanding tasks, faster app loading, and more fluid multitasking, and more optimized for 5G speeds..
AnTuTu Score627,869923,836S21 FE 5G will provide a smoother experience in general use and higher frame rates in gaming, and it is also more future-proof.
GPUAdreno 640Adreno 660S21 FE 5G has a significantly more powerful GPU, providing higher performance in graphics-intensive tasks, like gaming.

Camera

FeatureXiaomi Poco X3 ProSamsung Galaxy S21 FE 5GPractical Impact
Standard Camera48MP, f/1.79, 1/2", 0.8µm12MP, f/1.8, 1/1.76", 1.8µmS21 FE 5G's larger sensor and pixel size captures more light, resulting in better low-light performance and dynamic range. X3 Pro's high resolution allows for slightly better zooming.
Telephoto/Portrait CameraNone8MP, f/2.0, 1.0µmS21 FE 5G offers optical zoom capabilities for better portraits and zoomed shots; something lacking in the X3 Pro.
Selfie Camera20MP, f/2.2, 1/3.4", 0.8µm32MP, f/2.2, 1/2.8", 0.8µmS21 FE 5G has higher resolution for more detailed selfies and larger sensor size, which makes it more suitable for lower-light conditions.
Wide Angle Lens8MP, f/2.2, 1/4", 1.12µmNoneX3 Pro offers ultra-wide perspective for landscape or group shots.
Portrait Mode (Depth)2MP, f/2.4, 1/5", 1.75µmNoneX3 Pro has a dedicated depth sensor for portrait mode shots. However, software processing can be as effective, depending on implementation.
Macro Lens2MP, f/2.4, 1/5", 1.75µmNoneX3 Pro allows capturing close up subjects.
Wide Angle + MacroNone13MP, f/2.2, 1/3.06", 1.12µmS21 FE 5G offers a combined wide-angle and macro lens offering versatility.
Video StabilizationEISHDR, EISS21 FE 5G offers more advanced video stabilization for smoother footage.
DXOMark MobileNot AvailableMain score: 117, Photo score: 119, Video score: 107S21 FE 5G has been rated by DxOMark and can be a reliable benchmark.
DXOMark SelfieNot AvailableMain score: 127, Photo score: 126, Video score: 130S21 FE 5G has been rated by DxOMark and can be a reliable benchmark.

Battery

FeatureXiaomi Poco X3 ProSamsung Galaxy S21 FE 5GPractical Impact
Capacity5160mAh4500mAhX3 Pro's larger battery likely provides longer battery life for typical use, while the S21 FE 5G might require more frequent charging with heavy use.
Charging33W Fast Charging25W Fast ChargingX3 Pro charges faster, reducing downtime; S21 FE 5G is slightly slower but also has fast charging.
FeaturesNon-removableWireless Charging, Reverse Wireless Charging, No charger in-boxS21 FE 5G offers wireless and reverse wireless charging, which provides convenience for other devices, but no charger in-box, while the X3 Pro has no such capabilities.

2. Key Differences Analysis

Xiaomi Poco X3 Pro Advantages:

  • Larger Battery: Offers potentially longer battery life, beneficial for users who frequently use their phone throughout the day without access to a charger.
  • Faster Charging: Charges slightly faster, which helps to get back up and running quickly, beneficial for people on the go.
  • Wider variety of Camera Lenses: Has a dedicated macro and depth sensor, offering additional variety for photographers.
  • Lower Price: Usually more affordable, making it more accessible to budget-conscious buyers.

Samsung Galaxy S21 FE 5G Advantages:

  • Superior Display: AMOLED screen offers richer colors, deeper blacks, and better outdoor visibility compared to IPS LCD.
  • Better Performance: Snapdragon 888 chipset is significantly faster and more powerful than the Snapdragon 860, better for demanding tasks and gaming.
  • More Advanced Camera: Better low-light performance, optical zoom capabilities, more sophisticated video recording features, and overall better quality images.
  • Wireless Charging: Offers convenient wireless charging and reverse wireless charging features.
  • Water Resistance: Likely has better water and dust resistance (IP68) although no spec is listed, which makes it more robust against the elements.
  • Better software support: Samsung provides longer software support.
  • Better Build Quality: S21 FE 5G has Gorilla Glass Victus compared to Gorilla Glass 6 on the X3 Pro, this means it is more resistant to scratches and cracking.
  • Slightly More Compact and Lighter: More comfortable for daily use and carrying around.

Trade-offs

  • Poco X3 Pro: Offers a bigger battery and faster charging but at the expense of display quality, overall performance, and camera features. Its build is also less premium compared to the S21 FE.
  • S21 FE 5G: Offers a better display, performance, and camera at the cost of a slightly smaller battery, slower charging speeds, and a higher price.

3. User Profiles & Recommendations

Xiaomi Poco X3 Pro:

  • Ideal User: Budget-conscious users who value battery life, a large screen, and decent performance for casual use. Gamers on a budget might also appreciate it.
  • Use Cases:
    • Long gaming sessions (despite slightly lower GPU performance).
    • Media consumption on a large screen.
    • Users needing a reliable phone with good battery backup, but are less concerned about premium features or camera quality.
    • Those who want to take a variety of different photos, even if quality is lower.

Samsung Galaxy S21 FE 5G:

  • Ideal User: Users who prioritize a high-quality display, excellent performance, and a versatile camera system. Those who appreciate wireless charging and good software support.
  • Use Cases:
    • Mobile photography and videography with high dynamic range and zoom capabilities.
    • Demanding gaming and multitasking.
    • Users who consume a lot of visual content and want a vibrant display.
    • Users who value the convenience of wireless charging and a more premium feel.
    • Users who want a phone that will have a long software life.

4. Decision Framework

Key Questions to Ask:

  1. What is your budget? If you are very price-conscious, the Poco X3 Pro offers better battery life and is cheaper. If budget is not a concern, the S21 FE 5G offers premium features.
  2. How important is the display to you? If display quality is critical for your usage, the S21 FE 5G is significantly superior because of its AMOLED panel.
  3. What kind of tasks will you perform most often? Casual use? gaming? If it is casual use, the X3 Pro is sufficient, but for heavy use, the S21 FE 5G is recommended.

Scenario-Based Recommendations:

  • Scenario 1: Casual User on a Tight Budget: Choose the Xiaomi Poco X3 Pro for its large battery and decent performance at a lower price.
  • Scenario 2: Frequent Gamer: Choose the Samsung Galaxy S21 FE 5G for its superior processor and GPU, ensuring better gaming experience and longer software support.
  • Scenario 3: Photography Enthusiast: Choose the Samsung Galaxy S21 FE 5G because of its overall camera capabilities, with its optical zoom and OIS.
  • Scenario 4: User Prioritizing Display Quality: Choose the Samsung Galaxy S21 FE 5G for its vibrant AMOLED screen with superior outdoor visibility.

My Choice and Why

If I had to choose between these two phones, I would choose the Samsung Galaxy S21 FE 5G.

My reasoning is as follows: While the Xiaomi Poco X3 Pro has the benefit of a larger battery and faster charging, the overall experience of using the S21 FE 5G would be significantly better. The AMOLED screen is a game-changer, providing a much more immersive and enjoyable experience. The performance boost from the Snapdragon 888 chipset is also very noticeable, ensuring smooth and responsive operation even during heavy multitasking and gaming. The camera system on the S21 FE 5G is also superior, offering better image quality, optical zoom capabilities, and more advanced video recording features. While the S21 FE 5G is more expensive, the benefits it offers in display, performance, and camera features are worth the extra cost, providing a more premium experience that I would appreciate on a day-to-day basis, especially when using the phone outside. Finally, the longer software support also means that the S21 FE 5G will be relevant for longer than the X3 Pro.

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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