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

Detailed Comparison

Specification

General

Launch Date January 29, 2021 March 23, 2022
Release Year 2021 2022

Physical

Volume 111.09 cm³ 107.83 cm³
Screen Size to Weight Ratio 3 "/g 3.53 "/g
Weight 227 g 190 g
Height 165.1 mm 169.6 mm
Width 75.6 mm 76.6 mm
Thickness 8.9 mm 8.3 mm
Foldable Design No No
Available Colors
  • Phantom Black
  • Phantom Silver
  • Phantom Titanium
  • Phantom Navy
  • Phantom Brown
  • Navy
  • Mint Green
  • Graphite Gray
  • Ocean Blue

Display

Screen Size 6.8 " 6.71 "
Resolution 1440 x 3200 720 x 1650
Aspect Ratio 20:9 21:9
Screen-to-Body Ratio 89.4 % 82 %
Pixel Density 515 PPI 268 PPI
Refresh Rate 120 Hz N/A
Typical Brightness N/A N/A
HBM Brightness N/A N/A
Peak Brightness 1500 nits N/A

Hardware

Battery Capacity per Screen Area 108.13 mAh/in² 111.05 mAh/in²
Battery Density 45.01 mAh/cm³ 46.37 mAh/cm³
Battery Capacity 5000 mAh 5000 mAh
NFC Support Yes Yes
Chipset Exynos 2100 (5 nm) - International Qualcomm SM6225 Snapdragon 680 4G (6 nm)
CPU Octa-core (1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55) - International Octa-core (4x2.4 GHz Kryo 265 Gold & 4x1.9 GHz Kryo 265 Silver)
GPU Mali-G78 MP14 - International Adreno 610

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 11
Maximum OS Version 15

Comparison Summary

1. Specifications Comparison

Here's a detailed comparison of the Samsung Galaxy S21 Ultra 5G and Xiaomi Redmi 10C, focusing on practical implications:

Design

FeatureSamsung Galaxy S21 Ultra 5GXiaomi Redmi 10CPractical Impact
Dimensions165.1 × 75.6 × 8.9 mm169.6 × 76.6 × 8.3 mmS21 Ultra is slightly shorter and thicker, while the Redmi 10C is taller and thinner.
Weight227g190gRedmi 10C is noticeably lighter, making it more comfortable for prolonged use.
BuildCorning Gorilla Glass Victus (screen)Unknown (screen)S21 Ultra offers superior screen protection against scratches and drops. Redmi 10C's screen protection is not specified.

Display

FeatureSamsung Galaxy S21 Ultra 5GXiaomi Redmi 10CPractical Impact
Size6.8"6.71"Both have very similar screen sizes, a negligible difference.
Resolution1440x3200720x1650S21 Ultra provides significantly sharper and clearer visuals with much higher pixel density.
PPI515268S21 Ultra's higher pixel density means text and images appear much more detailed and less pixelated.
TechnologyAMOLEDIPS LCDS21 Ultra's AMOLED display offers deeper blacks, vibrant colors, and better contrast, along with superior power efficiency for dark themes.
Refresh Rate120Hz60HzS21 Ultra offers smoother scrolling and animations, making the user interface feel more fluid.
Brightness1500 nits0 nitsS21 Ultra provides significantly better outdoor visibility in bright sunlight. The Xiaomi's brightness is unknown.

Performance

FeatureSamsung Galaxy S21 Ultra 5GXiaomi Redmi 10CPractical Impact
ChipsetExynos 2100 (5 nm)Qualcomm Snapdragon 680 (6 nm)S21 Ultra's Exynos chipset is much more powerful, enabling smoother multitasking, faster app loading, and better gaming.
AnTuTu Score749,000248,639S21 Ultra has dramatically better overall performance, suitable for demanding tasks and games.
GPUMali-G78 MP14Adreno 610S21 Ultra's GPU is significantly more powerful, resulting in better graphics performance, especially in gaming.

Camera

FeatureSamsung Galaxy S21 Ultra 5GXiaomi Redmi 10CPractical Impact
Standard Camera108MP, f/1.8, 1/1.33", 0.8µm50MP, f/1.8, 1/2.76", 0.64µmS21 Ultra captures much more detailed photos with its higher resolution and larger sensor. It has better low-light performance.
Telephoto + Portrait10.8MP, f/2.4, 1/2.65", 1.22µmNot AvailableS21 Ultra offers optical zoom capabilities and dedicated portrait lens, leading to better image quality.
Selfie Camera44MP, f/2.2, 1/2.65", 0.7µm5MP, f/2.2S21 Ultra captures much higher-resolution and detailed selfies.
Telephoto Lens10.8MP, f/4.9, 1/2.65", 1.22µmNot AvailableS21 Ultra provides additional zoom capabilities.
Portrait Mode (Depth)Not Available2MP, f/2.4, 1/5", 1.75µmRedmi 10C has a depth sensor for portrait mode, though the quality will be lower than S21 Ultra's telephoto lens for portrait.
Wide Angle + Macro12.2MP, f/2.2, 1/2.55", 1.4µmNot AvailableS21 Ultra offers ultrawide and macro capabilities for versatile photography.
VideoUp to 8K@24fps, HDR, EIS, Stereo SoundUp to 1080p@30fpsS21 Ultra provides much higher quality video recording, including 8K resolution and advanced stabilization.
DxOMark (Mobile)115 (overall), 121 (photo), 100 (video)Not AvailableS21 Ultra has a significantly better camera performance based on DxOMark scores.
DxOMark (Selfie)135 (overall), 133 (photo), 140 (video)Not AvailableS21 Ultra has a significantly better selfie camera performance based on DxOMark scores.
Features4K/8K video, OIS, Optical Zoom, RAW, Night Mode, Quadruple Camera, etc.Digital Zoom, HDR, Dual Camera, etc.S21 Ultra has a much more advanced camera system with many more features compared to the Redmi 10C.

Battery

FeatureSamsung Galaxy S21 Ultra 5GXiaomi Redmi 10CPractical Impact
Capacity5000mAh5000mAhBoth have the same battery capacity suggesting similar battery life under average use.
Charging25W Fast Charging18W Fast ChargingS21 Ultra charges faster, reducing downtime.
FeaturesWireless charging, Reverse wireless chargingNoneS21 Ultra supports wireless charging, including reverse wireless, adding convenience.

2. Key Differences Analysis

Samsung Galaxy S21 Ultra 5G Advantages:

  • Superior Display: AMOLED, high resolution, 120Hz, and high brightness offers a much better visual experience.
  • Significantly Higher Performance: Faster chipset and GPU handle demanding tasks effortlessly, ideal for gaming and heavy multitasking.
  • Advanced Camera System: Much higher-resolution sensors, optical zoom, and diverse features result in far superior photo and video quality.
  • Faster Charging & Wireless Options: 25W charging and wireless charging capabilities offer more flexibility and reduced charging times.
  • Premium Audio: Enhanced audio features with Dolby Atmos, Hi-Res Audio, and stereo speakers.
  • More RAM & Storage: Larger capacity RAM and storage options are suitable for demanding users.
  • Superior Connectivity: Supports newer WiFi and Bluetooth standards, for better speeds and stability

Practical Implications:

* The S21 Ultra is the superior phone overall in almost every aspect. It is suitable for users who want a top-end smartphone.

Xiaomi Redmi 10C Advantages:

  • Lighter Weight: More comfortable for extended use.
  • Lower Price: A more budget-friendly option.
  • Depth Sensor: Has a depth sensor that the S21 Ultra lacks, though this will not be as good as telephoto or wide lens solutions.

Practical Implications:

* The Redmi 10C is a much cheaper phone. It is a good option for users on a budget or who just want a secondary phone.

Significant Trade-offs:

  • S21 Ultra: Significantly higher price.
  • Redmi 10C: Substantially lower performance, lower camera quality, basic display, and slower charging. It lacks many of the premium features of the S21 Ultra.

3. User Profiles & Recommendations

Samsung Galaxy S21 Ultra 5G Ideal Users:

  • Power Users: Individuals who require top-tier performance for gaming, multitasking, and resource-intensive apps.
  • Photography Enthusiasts: Users who prioritize high-quality photos and videos with advanced zoom capabilities and versatility.
  • Multimedia Consumers: Individuals who want the best display quality for streaming videos and consuming content.
  • Professionals: Users who need a reliable device with long battery life and excellent performance for work tasks.

Use Cases:

  • Professional photography and videography.
  • Playing graphically demanding games.
  • Heavy multitasking with numerous applications.
  • Enjoying high-quality multimedia content.

Xiaomi Redmi 10C Ideal Users:

  • Budget-Conscious Consumers: Users who are looking for an affordable smartphone for basic tasks.
  • First-Time Smartphone Buyers: Those who are not concerned with high-end features and are looking for a basic, functional device.
  • Users with Basic Needs: Users who prioritize basic functionality like calling, texting, and basic social media.
  • Those looking for secondary phone: Users who have another phone but need a secondary phone, or for users who want a phone that they don't mind if it gets broken

Use Cases:

  • Basic web browsing and social media.
  • Simple gaming and multimedia consumption.
  • As a secondary phone or a phone for basic tasks.

Price-to-Value Ratio:

  • Samsung Galaxy S21 Ultra 5G: Offers premium features and top-tier performance, justified by a high price. The value is high if you use the features it offers.
  • Xiaomi Redmi 10C: Provides a budget-friendly option with basic functionality. The value is high if you want a very cheap, secondary phone.

4. Decision Framework

Here are three key questions for potential buyers:

  1. What is your budget? The S21 Ultra is a premium phone, while the Redmi 10C is budget oriented.
  2. What are your primary use cases? Prioritize features based on your usage pattern.
  3. How important is performance and camera quality? If performance, display, and camera are critical, the S21 Ultra is the better choice. If these are less important, the Redmi 10C is good enough.

Scenario-Based Recommendations:

  • Scenario 1: Heavy User/Gaming:
    • Recommendation: Samsung Galaxy S21 Ultra 5G for its superior performance and display.
  • Scenario 2: Basic Use/Budget:
    • Recommendation: Xiaomi Redmi 10C for basic tasks and affordability.
  • Scenario 3: Photography Focus:
    • Recommendation: Samsung Galaxy S21 Ultra 5G for its superior camera system and diverse shooting modes.

My Choice

If I were choosing, I would choose the Samsung Galaxy S21 Ultra 5G. The reason is that it is a much better phone overall in almost every aspect, offering a superior user experience.

While I acknowledge that the Redmi 10C is a budget option with its own benefits (such as a lower price and lighter weight), the S21 Ultra's exceptional display quality, significantly higher performance, advanced camera system, and faster charging capabilities make it far more versatile and enjoyable to use daily.

For me, the premium features of the S21 Ultra justify the higher price tag, as they cater to my usage habits of needing a high performance and excellent display. As I would be using the phone as my main phone, the additional performance, significantly better display, better camera, and premium features like wireless charging are worth the added expense to me.

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.