Samsung Galaxy S21 5G vs Xiaomi Redmi Note 13 - Detailed Phone Comparison

Detailed Comparison

Specification

General

Launch Date January 29, 2021 January 10, 2024
Release Year 2021 2024

Physical

Volume 85.33 cm³ 91.83 cm³
Screen Size to Weight Ratio 3.67 "/g 3.82 "/g
Weight 169 g 174.5 g
Height 151.7 mm 161.1 mm
Width 71.2 mm 75 mm
Thickness 7.9 mm 7.6 mm
Foldable Design No No
Available Colors
  • Phantom White
  • Phantom Gray
  • Phantom Violet
  • Phantom Pink
  • Arctic White
  • Ocean Teal
  • Graphite black (Stealth Black)
  • Prism Gold

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 % 88.9 %
Pixel Density 421 PPI 395 PPI
Refresh Rate 120 Hz 120 Hz
Typical Brightness N/A N/A
HBM Brightness N/A N/A
Peak Brightness 1300 nits 1000 nits

Hardware

Battery Capacity per Screen Area 104.06 mAh/in² 112.39 mAh/in²
Battery Density 46.88 mAh/cm³ 54.45 mAh/cm³
Battery Capacity 4000 mAh 5000 mAh
NFC Support Yes Yes
Chipset Exynos 2100 (5 nm) - International Mediatek Dimensity 6080 (6 nm)
CPU Octa-core (1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55) - International Octa-core (2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55)
GPU Mali-G78 MP14 - International Mali-G57 MC2

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 13
Maximum OS Version 15 16

Comparison Summary

1. Specifications Comparison

FeatureSamsung Galaxy S21 5GXiaomi Redmi Note 13Practical Impact
Design
Dimensions151.7 x 71.2 x 7.9 mm161.1 x 75 x 7.6 mmS21 5G is more compact, easier for one-handed use. Redmi Note 13 is larger, may feel more immersive for media consumption.
Weight169g174.5gS21 5G is slightly lighter, potentially more comfortable for extended use.
Display
Size6.2"6.67"Redmi Note 13 offers a larger viewing area for media and gaming. S21 5G is more pocketable.
Resolution1080x24001080x2400Both have the same sharpness, no visible difference in clarity.
PPI421395S21 5G has slightly sharper text and images, though the difference is small.
TechnologyAMOLEDAMOLEDBoth provide vibrant colors and deep blacks.
Refresh Rate120Hz120HzBoth offer smooth scrolling and animations.
Brightness1300 nits0 nitsS21 5G is much brighter and more visible in direct sunlight. The brightness for Redmi Note 13 is missing, making it unsuitable for bright conditions.
Performance
ChipsetExynos 2100 (5 nm)Mediatek Dimensity 6080 (6 nm)S21 5G offers faster processing for demanding apps and gaming. The 6nm on the Redmi Note 13 will be less power efficient and slightly slower.
AnTuTu Score749,100448,036S21 5G delivers a notably smoother experience with significantly faster app loading, multitasking, and better gaming performance.
GPUMali-G78 MP14Mali-G57 MC2S21 5G provides substantially better graphics performance for gaming and video editing.
Battery
Capacity4000mAh5000mAhRedmi Note 13 should offer longer battery life on a single charge.
Charging25W Fast Charging33W Fast ChargingRedmi Note 13 charges slightly faster.
FeaturesWireless, Reverse ChargingNon-removableS21 5G offers more charging versatility (wireless charging and reverse wireless charging).
Camera
Main Camera12MP (f/1.8)108MP (f/1.7)Redmi Note 13 captures more detailed images with higher resolution. While the S21 5G might have better pixel quality, the difference in resolution is very large.
Telephoto+Portrait64MP (f/2.0)N/AS21 5G provides better zoom capabilities and portrait shots.
Selfie Camera10MP (f/2.2)16MP (f/2.4)Redmi Note 13 provides higher-resolution selfies, however the S21 has a slightly wider aperture.
Wide Angle LensN/A8MP (f/2.2)Redmi Note 13 allows for wider field-of-view shots.
Portrait Mode (Depth)N/A2MP (f/2.4)Redmi Note 13 has a dedicated sensor to assist with depth information and improve portrait quality.
Wide Angle + Macro12.2MP (f/2.2)N/AS21 5G has an ultrawide lens that also functions as a macro camera.
Video RecordingUp to 8K@24fpsUp to 1080p@30fpsS21 5G records much higher resolution and quality videos with better stabilization.
DxOMarkMobile: 111 Selfie: 132N/AS21 5G has well-tested and reviewed camera capabilities, though they may not compare to newer phones. Redmi Note 13 has no information, making it hard to compare.
Camera FeaturesAdvancedBasicS21 5G has more advanced camera features such as optical zoom, OIS, RAW capture and night mode.
Software
OSAndroid 11 (upgradable to 15)Android 13 (upgradable to 16)Redmi Note 13 ships with a newer Android version, and is likely to have one more year of support.
Connectivity
WiFiWiFi 6 (802.11ax)WiFi 5 (802.11ac)S21 5G offers faster and more efficient WiFi.
Bluetooth5.05.3Redmi Note 13 features a newer version of Bluetooth for better audio quality and battery saving.
GPSAdvancedBasicS21 5G has more precise location tracking using more satellite systems.
Storage
Internal128/256 GB128/256 GBBoth offer the same maximum storage capacity.
RAM8 GB6/8/12 GBRedmi Note 13 can have more RAM for better multitasking performance.
ExpandableNoNoNeither phone offers expandable storage via microSD.
Audio
QualityAdvancedBasicS21 5G offers stereo speakers, spatial audio and noise-cancelling microphone.
Security
FeaturesBasic FingerprintSide-mounted fingerprint sensorRedmi Note 13 has a faster, more accessible fingerprint sensor.
Build Quality
Screen ProtectionGorilla Glass VictusGorilla Glass 5S21 5G has more durable glass for scratch and impact protection.
SensorsAdvancedBasicS21 5G has more sensor capabilities for use with other devices and software.

2. Key Differences Analysis

Samsung Galaxy S21 5G Advantages:

  • Superior Performance: The Exynos 2100 chipset provides significantly faster performance, better for gaming, and heavy multitasking.
  • High-Quality Display: Much higher brightness makes it more suitable for outdoor use. Higher pixel density also adds to a better user experience.
  • Advanced Camera System: The S21 5G excels in video recording, offering 8K and 4K at 60fps recording. It also has Optical Image Stabilization and optical zoom for better picture quality. DxOMark scores suggest it has good image and video quality.
  • Versatile Battery Features: Wireless and reverse wireless charging adds convenience and makes the phone act as a power bank for other devices.
  • Premium Build: The Gorilla Glass Victus offers greater screen protection, giving a more robust feel.
  • Better Audio: Stereo speakers and a noise-cancellation microphone make it better for video viewing, listening to music and taking calls.
  • Advanced Sensor Suite: Barometer, Hall and Geomagnetic sensors allow for more features.
  • Faster WiFi: Supports Wi-Fi 6.

Xiaomi Redmi Note 13 Advantages:

  • Larger Display: The 6.67" screen offers a more immersive media consumption experience.
  • Bigger Battery: A 5000mAh battery provides better battery life for less frequent charging.
  • Newer Android Version: Ships with Android 13, likely receiving one more year of software updates.
  • Newer Bluetooth: Features a newer version for better audio and battery efficiency.
  • More RAM options: Available with up to 12 GB of RAM.
  • Faster Charging: Offers 33W charging for a faster charge.
  • Dedicated Wide Angle and Macro Lens The dedicated ultrawide lens is useful in a variety of situations.

Trade-offs:

  • The S21 5G has superior processing and camera quality but has a smaller battery, less RAM and lacks some of the camera features present on the Redmi Note 13.
  • The Redmi Note 13 offers a bigger battery and a larger screen for media consumption, but lacks the raw performance and superior camera technology present in the S21 5G. It also has a screen that is likely not suitable for outdoor use.

3. User Profiles & Recommendations

Samsung Galaxy S21 5G:

  • Ideal User: Users who prioritize performance, camera quality, and a premium build.
  • Use Cases:
    • Mobile gamers who require high frame rates and responsiveness.
    • Users who regularly shoot videos and photos, especially in varying lighting conditions.
    • Professionals who need a phone that performs reliably and has the connectivity for mobile working.
    • Users who require wireless charging options.

Xiaomi Redmi Note 13:

  • Ideal User: Users who prioritize battery life, a large display for media, and a newer version of Android.
  • Use Cases:
    • Users who watch lots of videos, browse the internet and read e-books.
    • Users who want a phone with a long battery life.
    • Budget-conscious consumers looking for a phone with a decent camera and screen.
    • Users who need more RAM for multitasking.

Price-to-Value Ratio:

  • The S21 5G offers high performance and great camera quality, but it is an older flagship and might be priced higher than the Xiaomi Note 13.
  • The Redmi Note 13 provides value for its price, offering a larger display, higher battery capacity, and a newer Android version, making it an appealing budget option.

4. Decision Framework

Key Questions for Buyers:

  1. Performance vs Battery Life: Do you prioritize processing power and camera quality (S21 5G), or longer battery life and a large screen (Redmi Note 13)?
  2. Display Needs: Do you need a screen that is bright and visible in direct sunlight (S21 5G), or is a large screen for indoor media consumption more important (Redmi Note 13)?
  3. Budget: How much are you willing to spend and what is your value for money? The S21 5G might be more expensive because it is an older premium phone.

Scenario-Based Recommendations:

  • For Gamers/Power Users: Choose the Samsung Galaxy S21 5G for its superior processor, GPU, better display and advanced camera functionality.
  • For Media Consumers/Travelers: Choose the Xiaomi Redmi Note 13 for its longer battery life, larger display and its higher RAM option.
  • For Budget Users Choose the Xiaomi Redmi Note 13 as it will likely be cheaper and offer a great all-round package.
  • For Camera Enthusiasts: Choose the Samsung Galaxy S21 5G for its high DxOMark score, 8K video recording and Optical Image Stabilisation.

My Choice

I would choose the Samsung Galaxy S21 5G. While the Xiaomi Redmi Note 13 has some great features like a larger battery, a newer android version, and more RAM options, the S21 5G provides a superior user experience in areas that are most important to me. The brighter screen is crucial for outdoor use, and the significantly better performance would make daily tasks smoother and more enjoyable. Furthermore, the superior camera system with 8K recording, optical zoom, and image stabilization makes it a much more versatile option for capturing photos and videos.

While the battery capacity of the S21 5G is smaller, the additional features (Wireless Charging) allow for flexibility in charging. The premium build quality with Gorilla Glass Victus adds to durability. For me, the overall user experience offered by the S21 5G outweighs the benefits of the larger battery and larger display on the Redmi Note 13. The S21 5G is a more complete package, catering to those who value performance, display quality, and camera capabilities above other considerations. It must be considered that these are both older phones, so it would be worth comparing current alternatives before purchase.

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.