Samsung Galaxy S21 5G vs Xiaomi Poco F4 - Detailed Phone Comparison

Detailed Comparison

Specification

General

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

Physical

Volume 85.33 cm³ 95.5 cm³
Screen Size to Weight Ratio 3.67 "/g 3.42 "/g
Weight 169 g 195 g
Height 151.7 mm 163.2 mm
Width 71.2 mm 76 mm
Thickness 7.9 mm 7.7 mm
Foldable Design No No
Available Colors
  • Phantom White
  • Phantom Gray
  • Phantom Violet
  • Phantom Pink
  • Night Black
  • Moonlight Silver
  • Nebula Green

Display

Screen Size 6.2 " 6.67 "
Resolution 1080 x 2400 1080 x 2400
Aspect Ratio 20:9 20:9
Screen-to-Body Ratio 85.9 % 86.6 %
Pixel Density 421 PPI 395 PPI
Refresh Rate 120 Hz 120 Hz
Typical Brightness N/A N/A
HBM Brightness N/A 900 nits
Peak Brightness 1300 nits 1300 nits

Hardware

Battery Capacity per Screen Area 104.06 mAh/in² 101.15 mAh/in²
Battery Density 46.88 mAh/cm³ 47.12 mAh/cm³
Battery Capacity 4000 mAh 4500 mAh
NFC Support Yes Yes
Chipset Exynos 2100 (5 nm) - International Qualcomm SM8250-AC Snapdragon 870 5G (7 nm)
CPU Octa-core (1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55) - International Octa-core (1x3.2 GHz Kryo 585 & 3x2.42 GHz Kryo 585 & 4x1.80 GHz Kryo 585)
GPU Mali-G78 MP14 - International Adreno 650

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 13

Comparison Summary

1. Specifications Comparison

Here's a detailed comparison of the Samsung Galaxy S21 5G and Xiaomi Poco F4, focusing on practical implications:

Design

FeatureSamsung Galaxy S21 5GXiaomi Poco F4Practical Impact
Dimensions151.7 × 71.2 × 7.9 mm163.2 × 76 × 7.7 mmThe Poco F4 is noticeably taller and wider, making it less pocketable and harder to use one-handed. The S21 is slightly thicker but this is less noticeable.
Weight169g195gThe S21 is significantly lighter, making it more comfortable for extended use and easier to carry around.
BuildStandardStandardBoth have standard smartphone builds

Display

FeatureSamsung Galaxy S21 5GXiaomi Poco F4Practical Impact
Size6.2"6.67"The Poco F4 has a larger screen, better for media consumption, gaming, and multitasking. The S21 is more compact for better portability
Resolution1080x24001080x2400Both have the same resolution and similar sharpness
Pixel Density421 PPI395 PPIThe S21 has a slightly sharper display due to higher pixel density but not significant in regular use.
TechnologyAMOLEDAMOLEDBoth offer vibrant colors and deep blacks; no practical difference here.
Refresh Rate120Hz120HzBoth provide smooth scrolling and animation, enhancing the user experience
Brightness1300 nits1300 nitsBoth have excellent peak brightness, ensuring good visibility even in bright sunlight.

Performance

FeatureSamsung Galaxy S21 5GXiaomi Poco F4Practical Impact
ChipsetExynos 2100 (5 nm)Snapdragon 870 5G (7 nm)The Snapdragon 870 in the Poco F4 is generally more efficient, offering better sustained performance for demanding tasks and gaming.
AnTuTu Score749,100861,200The Poco F4 demonstrates superior overall performance, as indicated by the higher AnTuTu score.
GPUMali-G78 MP14Adreno 650The Adreno 650 in the Poco F4 is usually better for gaming performance.

Camera

FeatureSamsung Galaxy S21 5GXiaomi Poco F4Practical Impact
Standard Camera12MP, f/1.8, 1/1.76"64MP, f/1.79, 1/2"The Poco F4 captures more detail with its higher resolution sensor. The S21, with a larger sensor, may perform better in low light.
Telephoto/Portrait64MP, f/2.0, 1/1.72"NoneThe S21 offers dedicated zoom capabilities which the Poco F4 lacks
Selfie Camera10MP, f/2.2, 1/3.2"20MP, f/2.4, 1/2"The Poco F4's front camera captures more detail, while the S21 has slightly wider aperture, which could result in slightly better low-light performance.
Wide AngleNone8MP, f/2.2, 1/4"The Poco F4 offers a dedicated wide-angle lens, allowing for more versatile photography.
MacroNone2MP, f/2.4, 1/5"The Poco F4 provides a dedicated macro lens for detailed close-up shots.
Wide Angle + Macro12.2MP, f/2.2, 1/2.55"NoneThe S21 offers a versatile ultra-wide lens for detailed close-up shots.
VideoUp to 8K@24fpsUp to 4K@60fpsThe S21 has higher video capabilities, suitable for professional use. Both offer similar stabilization and slow-motion features.
DxOMark Mobile111Not AvailableS21 has a DxOMark rating of 111 suggesting good camera performance
DxOMark Selfie132Not AvailableS21 has a DxOMark rating of 132, which suggests good selfie quality

Battery

FeatureSamsung Galaxy S21 5GXiaomi Poco F4Practical Impact
Capacity4000 mAh4500 mAhThe Poco F4 offers significantly better battery life, lasting longer on a single charge.
Charging25W Fast Charging67W Fast ChargingThe Poco F4 charges much faster, reducing downtime.
FeaturesWireless Charging, Reverse ChargingNoneThe S21 offers the convenience of wireless charging and reverse charging.

2. Key Differences Analysis

Samsung Galaxy S21 5G Advantages:

  • More Compact and Lighter: Easier to handle and carry, better for one-handed use.
  • Better Display Protection: Corning Gorilla Glass Victus offers superior scratch and shatter resistance.
  • Wireless Charging and Reverse Wireless Charging: Offers convenience and can charge other devices.
  • 8K Video Recording: Higher resolution video recording, suitable for professional content creators.
  • Telephoto Lens: Dedicated zoom capabilities.
  • Environmental Sensors: Barometer for weather tracking and altimeter.

Xiaomi Poco F4 Advantages:

  • Larger Display: Better for media consumption, gaming, and multitasking.
  • Faster Processor: Superior sustained performance for demanding tasks, more efficient for longer battery life.
  • Higher Resolution Standard Camera: Captures more detailed photos.
  • Dedicated Wide-Angle and Macro Lenses: More versatile photographic options.
  • Larger Battery: Longer battery life for all-day use.
  • Faster Charging: Significantly reduces charging time.
  • Newer Bluetooth Version: Support for higher quality Bluetooth Audio.

Trade-offs:

  • The Samsung Galaxy S21 5G prioritizes a more premium build, compact size, and advanced camera features, but it has a smaller battery and lacks the wide and macro lenses.
  • The Xiaomi Poco F4 emphasizes performance, display size, and versatile camera capabilities with better battery life and faster charging, but it is larger, heavier, and lacks wireless charging.

3. User Profiles & Recommendations

Samsung Galaxy S21 5G is ideal for:

  • Users who prefer a compact and lightweight phone: Those who value portability and single-handed use.
  • Users who value premium build and display protection: Those who are rough on their phones.
  • Users who need wireless charging and reverse wireless charging: Those who value convenience and the ability to charge accessories.
  • Users who enjoy professional video recording: Those who want the best quality video with 8k recording.
  • Users who want a good camera with optical zoom capabilities: For those who like to zoom without compromising quality.

Use Cases:

  • Daily commuting where a compact phone is easier to carry.
  • Professional video recording for content creators
  • Occasional photographers who want a versatile camera.
  • Users who need wireless charging for their other devices.

Xiaomi Poco F4 is ideal for:

  • Gamers and power users: Those who demand high performance and sustained performance.
  • Media consumers: Those who enjoy watching videos and playing games on a larger display.
  • Users who value battery life and fast charging: Those who need a phone that can last a full day without frequent charging.
  • Photography enthusiasts: Those who enjoy capturing wide-angle and close-up shots.

Use Cases:

  • Mobile gaming for extended periods.
  • Watching movies and videos on the go.
  • Travelers who need a long-lasting battery.
  • Versatile everyday photography

Price-to-Value Ratio:

  • Given it's older, the S21 might be more affordable depending on the market and deals, while still offering some premium features.
  • The Poco F4 typically provides excellent performance and features for its price, representing a higher performance-to-price ratio.

4. Decision Framework

Key Questions to Consider:

  1. Do you prioritize portability and premium build, or a larger display and better performance?
  2. How important is wireless charging and reverse wireless charging?
  3. How important is video recording or camera zoom capabilities versus battery life and versatile cameras?

Scenario-Based Recommendations:

  • Scenario 1: You're a casual user who values compactness and ease of use.

    • Recommendation: Samsung Galaxy S21 5G is a better choice due to its compact size and light weight, while still offering good performance and a great camera.
  • Scenario 2: You're a mobile gamer or power user who needs the best performance and battery life.

    • Recommendation: Xiaomi Poco F4 is the preferred choice due to its superior performance, larger battery, and faster charging.
  • Scenario 3: You're a professional user who values video recording and optical zoom.

    • Recommendation: Samsung Galaxy S21 5G with its 8K video recording and telephoto lens is the better option.
  • Scenario 4: You're a photography enthusiast who wants more versatile camera options.

    • Recommendation: Xiaomi Poco F4 with its dedicated wide-angle and macro lenses would be the more versatile option.

My Choice

If I had to choose between these two phones, I would personally choose the Xiaomi Poco F4. While the Samsung Galaxy S21 5G offers some advantages, such as a more compact design and wireless charging, the Poco F4's overall balance of performance, battery life, and versatile camera features aligns more with my preferences. The faster charging and superior performance of the Poco F4 would make a more significant difference in my day-to-day use. Although I appreciate the S21's premium build, the Poco F4 offers a compelling value proposition for its price that's hard to overlook. As a power user, I would greatly benefit from the Snapdragon 870 chipset and faster charging, and wouldn't miss features like wireless charging.

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
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Bridging technical complexity with engaging, accessible narratives.