Samsung Galaxy S21 5G vs Xiaomi Redmi Note 10 - Detailed Phone Comparison

Detailed Comparison

Specification

General

Launch Date January 29, 2021 March 16, 2021
Release Year 2021 2021

Physical

Volume 85.33 cm³ 99.25 cm³
Screen Size to Weight Ratio 3.67 "/g 3.6 "/g
Weight 169 g 178.8 g
Height 151.7 mm 160.5 mm
Width 71.2 mm 74.5 mm
Thickness 7.9 mm 8.3 mm
Foldable Design No No
Available Colors
  • Phantom White
  • Phantom Gray
  • Phantom Violet
  • Phantom Pink
  • Shadow Black (Onyx Gray)
  • Frost White (Pebble White)
  • Aqua Green (Lake Green)

Display

Screen Size 6.2 " 6.43 "
Resolution 1080 x 2400 1080 x 2400
Aspect Ratio 20:9 20:9
Screen-to-Body Ratio 85.9 % 83.5 %
Pixel Density 421 PPI 409 PPI
Refresh Rate 120 Hz N/A
Typical Brightness N/A 450 nits
HBM Brightness N/A N/A
Peak Brightness 1300 nits 1100 nits

Hardware

Battery Capacity per Screen Area 104.06 mAh/in² 120.93 mAh/in²
Battery Density 46.88 mAh/cm³ 50.38 mAh/cm³
Battery Capacity 4000 mAh 5000 mAh
NFC Support Yes No
Chipset Exynos 2100 (5 nm) - International Qualcomm SDM678 Snapdragon 678 (11 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 Kryo 460 Gold & 6x1.7 GHz Kryo 460 Silver)
GPU Mali-G78 MP14 - International Adreno 612

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 12

Comparison Summary

1. Specifications Comparison

Design

FeatureSamsung Galaxy S21 5GXiaomi Redmi Note 10Practical Impact
Dimensions151.7 × 71.2 × 7.9 mm160.5 × 74.5 × 8.3 mmThe S21 is noticeably more compact and easier to handle with one hand. The Note 10 is larger and may be less comfortable for smaller hands.
Weight169g178.8gThe S21 feels slightly lighter, making it more comfortable for extended use and easier to carry.
Build MaterialNot specifiedNot specifiedNeed further details.
Screen ProtectionCorning Gorilla Glass VictusCorning Gorilla Glass 3S21 has a significantly more robust screen, offering better protection against scratches and drops.

Display

FeatureSamsung Galaxy S21 5GXiaomi Redmi Note 10Practical Impact
Size6.2"6.43"Redmi Note 10 offers slightly more screen real estate for media consumption and multitasking.
Resolution1080 x 24001080 x 2400Both have the same Full HD+ resolution, providing similar sharpness.
PPI421409Very similar pixel density, offering comparable image clarity on both.
TechnologyAMOLEDAMOLEDBoth offer vibrant colors, deep blacks, and excellent contrast.
Refresh Rate120Hz60HzThe S21's 120Hz display provides much smoother scrolling and animations, enhancing the user experience.
Brightness1300 nits1100 nitsThe S21's brighter display offers better visibility under direct sunlight.

Performance

FeatureSamsung Galaxy S21 5GXiaomi Redmi Note 10Practical Impact
ChipsetExynos 2100 (5 nm)Snapdragon 678 (11 nm)The S21's flagship-level chip provides significantly faster processing, smoother multitasking, and better gaming performance.
AnTuTu Score749,100277,254The S21 has a vastly superior benchmark score, indicating a massive performance difference, making it much faster overall.
GPUMali-G78 MP14Adreno 612The S21's GPU handles graphically intensive games and applications with much higher fidelity and fluidity.
RAM8GB4GB or 6GBS21 has significantly more RAM, resulting in better multitasking and smooth background app switching.

Camera

FeatureSamsung Galaxy S21 5GXiaomi Redmi Note 10Practical Impact
Standard Camera12MP, f/1.8, 1/1.76"48MP, f/1.79, 1/2"Note 10 has higher resolution, but S21 has a larger sensor and wider aperture, likely resulting in better low-light performance.
Telephoto + Portrait64MP, f/2.0, 1/1.72"NoneS21 has a dedicated telephoto lens for zoomed shots and portrait mode.
Selfie Camera10MP, f/2.2, 1/3.2"13MP, f/2.45, 1/3.06"Note 10 has slightly higher resolution, but S21's wider aperture may result in better low-light selfies.
Wide Angle Lens12.2MP, f/2.2, 1/2.55"8MP, f/2.2, 1/2.8"S21 has a dedicated wide angle lens. Xiaomi has a wide angle lens with lower resolution than S21's wide angle.
Portrait (Depth)None2MP, f/2.4Note 10 has dedicated sensor for depth effects, which is missing on the S21.
Macro LensNone2MP, f/2.4Note 10 includes a dedicated macro lens.
VideoUp to 8K@24fpsUp to 4K@30fpsS21 can record higher resolution videos.
DxOMark Score (Mobile)111N/AS21's camera is objectively better than Note 10's camera.
DxOMark Score (Selfie)132N/AS21's selfie camera is objectively better than Note 10's selfie camera.

Battery

FeatureSamsung Galaxy S21 5GXiaomi Redmi Note 10Practical Impact
Capacity4000mAh5000mAhThe Note 10's larger battery offers significantly longer battery life.
Charging25W33WNote 10 charges faster.
FeaturesWireless charging 15W, Reverse Wireless charging 4.5WNoneS21 includes wireless charging capabilities, and can wirelessly charge other devices.

2. Key Differences Analysis

Samsung Galaxy S21 5G Advantages:

  • Superior Performance: Flagship-level Exynos 2100 chip significantly outperforms the Snapdragon 678, providing a much smoother and more responsive experience for all tasks.
  • High Refresh Rate Display: The 120Hz display offers a much smoother visual experience compared to the 60Hz panel on the Note 10, enhancing scrolling and animations.
  • Brighter Display: 1300 nits brightness provides much better outdoor visibility than the Note 10's 1100 nits.
  • Enhanced Camera System: Features a versatile triple-lens system with a dedicated telephoto lens, resulting in superior image quality, more optical zoom capabilities and better overall camera performance.
  • Premium Features: Includes wireless charging, reverse wireless charging, and a more robust screen protection with Gorilla Glass Victus.
  • Better Video capabilities: 8K video recording allows for professional-grade video recording and content creation.
  • More Advanced Wifi and GPS: The S21 provides better wifi connection and more GPS options for better location accuracy.
  • Better Audio Quality: The S21 has Dolby Atmos and Noise cancellation for clearer calls.
  • More Internal Storage and RAM: The S21 provides more storage and RAM.

Xiaomi Redmi Note 10 Advantages:

  • Larger Battery: The 5000mAh battery offers significantly longer battery life compared to the S21's 4000mAh.
  • Faster Charging: 33W fast charging is faster than the S21's 25W.
  • More Camera Lenses: The Note 10 includes a dedicated macro and depth sensor which are missing in the S21.
  • More Advanced Security: Side-mounted fingerprint sensor offers more advanced security than the S21's basic fingerprint sensor.
  • Lower Price: The Redmi Note 10 typically comes at a more affordable price point compared to the S21.

Trade-offs

  • The S21 trades battery life and affordability for significantly better performance, display quality, camera system, and premium features.
  • The Note 10 sacrifices performance, display smoothness, and overall camera quality for longer battery life, faster charging and a much lower price.

3. User Profiles & Recommendations

Samsung Galaxy S21 5G Ideal Users:

  • Power Users: Individuals who need top-tier performance for demanding apps, multitasking, and gaming.
  • Photography Enthusiasts: Users who want versatile camera capabilities, excellent image quality, and 8K video recording.
  • Multimedia Consumers: Those who enjoy watching videos, playing games, and want the best possible display and audio experience.
  • Users who value premium features: Those who want wireless charging, reverse wireless charging, and a more robust screen protection.
  • Users who value better Wifi and GPS: Those who need better wifi performance, low latency, and better GPS accuracy.

Specific Use Cases:

  • Playing graphically intensive games like Genshin Impact or Call of Duty Mobile.
  • Editing 4K videos on the go.
  • Using multiple apps simultaneously without lag or slowdown.
  • Capturing high-quality photos and videos in diverse conditions.
  • Streaming media with excellent image clarity and sound quality.

Xiaomi Redmi Note 10 Ideal Users:

  • Budget-Conscious Consumers: Users who prioritize affordability and value-for-money over top-tier specifications.
  • Battery Life Seekers: Individuals who need all-day battery life and prefer not to charge their phone frequently.
  • Casual Photographers: Users who want a decent camera for everyday use but aren't demanding professional results.
  • Users who value advanced biometric features: Users who need a more advanced fingerprint sensor.
  • Users who like to take macro and depth photos: Those who need macro and depth camera lenses.

Specific Use Cases:

  • Browsing social media, texting, and making calls.
  • Watching videos and movies occasionally.
  • Taking everyday photos and videos in good lighting conditions.
  • Using the phone for extended periods without worrying about battery life.
  • Basic gaming on less demanding titles.

Price-to-Value Ratio

  • The Samsung Galaxy S21 5G offers a premium experience at a higher price point. Its value is in its performance, display, camera, and features.
  • The Xiaomi Redmi Note 10 provides good value for its price, offering a good balance of features and performance for everyday use.

4. Decision Framework

Key Questions for Buyers:

  1. Performance Needs: Do you need a phone for demanding tasks like gaming and video editing, or is casual usage sufficient?
  2. Battery Life Priority: Do you prioritize long battery life, or is a better screen and camera quality more important?
  3. Budget Constraints: What is your budget, and are you willing to pay more for premium features and performance?

Scenario-Based Recommendations:

  • Scenario 1: Power User / Gamer: Choose the Samsung Galaxy S21 5G for its superior performance, smoother display, and advanced camera features.
  • Scenario 2: Long Battery Life & Budget Conscious: Choose the Xiaomi Redmi Note 10 for its larger battery, faster charging and lower price.
  • Scenario 3: Balanced User: If budget allows, and if a better camera, display and performance are a necessity, choose the Samsung Galaxy S21 5G since it provides a better overall experience.

My Choice

If I were to choose between these two phones, I would pick the Samsung Galaxy S21 5G. Here’s why:

  • Performance is Paramount: I frequently use my phone for demanding tasks, including multitasking, and gaming. The Exynos 2100 chip in the S21 offers a significantly better experience in these areas.
  • Display Experience: The 120Hz refresh rate and brighter AMOLED panel make a noticeable difference in everyday use. The smoother scrolling and animations improve the overall feel of the phone.
  • Camera Versatility: While the Redmi Note 10 has more lenses, the S21’s camera system, with its telephoto lens and better image quality, is more appealing to me since I take a lot of photos and videos.
  • Future-Proofing: The S21’s more powerful chipset, faster wifi standards and features make it more future-proof compared to the Redmi Note 10.

While I acknowledge the Redmi Note 10's advantage in battery life and charging speed, the S21's overall package is more compelling for my usage needs.

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
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  • User-centric technology insights

Bridging technical complexity with engaging, accessible narratives.