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

Detailed Comparison

Specification

General

Launch Date January 29, 2021 September 21, 2023
Release Year 2021 2023

Physical

Volume 111.09 cm³ 106.59 cm³
Screen Size to Weight Ratio 3 "/g 3.35 "/g
Weight 227 g 199 g
Height 165.1 mm 161.4 mm
Width 75.6 mm 74.2 mm
Thickness 8.9 mm 8.9 mm
Foldable Design No No
Available Colors
  • Phantom Black
  • Phantom Silver
  • Phantom Titanium
  • Phantom Navy
  • Phantom Brown
  • Navy
  • Midnight Black (Fushion Black)
  • Moonlight White (Fushion White)
  • Aurora Purple
  • Fushion Purple
  • Camo Green

Display

Screen Size 6.8 " 6.67 "
Resolution 1440 x 3200 1220 x 2712
Aspect Ratio 20:9 20:9
Screen-to-Body Ratio 89.4 % 89.7 %
Pixel Density 515 PPI 446 PPI
Refresh Rate 120 Hz 120 Hz
Typical Brightness N/A N/A
HBM Brightness N/A N/A
Peak Brightness 1500 nits 1800 nits

Hardware

Battery Capacity per Screen Area 108.13 mAh/in² 112.39 mAh/in²
Battery Density 45.01 mAh/cm³ 46.91 mAh/cm³
Battery Capacity 5000 mAh 5000 mAh
NFC Support Yes Yes
Chipset Exynos 2100 (5 nm) - International Mediatek Dimensity 7200 Ultra (4 nm)
CPU Octa-core (1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55) - International Octa-core (2x2.8 GHz Cortex-A715 & 6x2.0 GHz Cortex-A510)
GPU Mali-G78 MP14 - International Mali-G610 MC4

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 Ultra 5GXiaomi Redmi Note 13 Pro+Practical Impact
Design
Dimensions165.1 x 75.6 x 8.9 mm161.4 x 74.2 x 8.9 mmS21 Ultra is slightly taller and wider, might feel bulkier in hand. Both have same thickness.
Weight227g199gRedmi Note 13 Pro+ is significantly lighter, more comfortable for extended use.
Display
Size6.8"6.67"S21 Ultra offers a slightly larger screen for more immersive media consumption.
Resolution1440 x 32001220 x 2712S21 Ultra has a noticeably sharper display with higher pixel density.
PPI515446S21 Ultra provides finer details and text clarity, especially noticeable for reading and high-resolution content.
TechnologyAMOLEDAMOLEDBoth offer vibrant colors and deep blacks.
Refresh Rate120Hz120HzBoth provide smooth scrolling and animations.
Brightness1500 nits1800 nitsRedmi Note 13 Pro+ is significantly brighter, better for outdoor visibility in direct sunlight.
Performance
ChipsetExynos 2100 (5 nm)Mediatek Dimensity 7200 Ultra (4 nm)Different processors; Dimensity 7200 Ultra is newer, potentially more power efficient.
AnTuTu Score749,000803,381Redmi Note 13 Pro+ shows slightly better performance in benchmarks, should translate to slightly faster app loading and multitasking.
GPUMali-G78 MP14Mali-G610 MC4Different GPUs; general performance difference unclear without detailed gaming benchmarks.
Camera
Standard Rear Camera108MP, f/1.8, 1/1.33" sensor200MP, f/1.65, 1/1.4" sensorRedmi Note 13 Pro+ has higher resolution, better for large prints and cropping; S21 Ultra has slightly larger sensor, potentially better low light performance.
Telephoto + Portrait10.8MP, f/2.4, 1/2.65" sensorNot availableS21 Ultra has a dedicated telephoto camera for optical zoom and portrait shots.
Telephoto Lens10.8MP, f/4.9, 1/2.65" sensorNot availableS21 Ultra has a dedicated telephoto lens for further optical zoom.
Wide Angle + Macro12.2MP, f/2.2, 1/2.55" sensor8MP, f/2.2, 1/2.8" sensorS21 Ultra has a higher resolution, wider-angle lens, better for capturing group shots and landscape.
Selfie Camera44MP, f/2.2, 1/2.65" sensor16MP, f/2.4, 1/3.06" sensorS21 Ultra has higher resolution, wider aperture for brighter selfies.
Portrait mode (depth)Not available2MP, f/2.4, 1/5" sensorRedmi Note 13 Pro+ has a dedicated depth sensor for improved portrait effects.
Video RecordingUp to 8K@24fpsUp to 4K@30fpsS21 Ultra records higher resolution videos, beneficial for professional videography.
DxoMark Mobile Score115121Redmi Note 13 Pro+ scores slightly higher for overall mobile camera performance, particularly for video.
DxoMark Selfie Score135Not availableS21 Ultra has a tested selfie camera performance, Redmi Note 13 Pro+ has no tests.
Camera FeaturesQuadruple Camera, Optical Zoom, Laser AFTriple camera, no optical zoom,S21 Ultra features superior optical zoom capabilities, suitable for different scenarios.
Battery
Capacity5000mAh5000mAhBoth have similar battery capacity.
Charging25W fast charging120W fast chargingRedmi Note 13 Pro+ charges significantly faster.
Battery FeaturesWireless charging, reverse chargingNo wireless charging or reverse chargingS21 Ultra offers more versatility for charging other devices.
Software
OSAndroid 11, Upgradable to 15Android 13, Upgradable to 16Redmi Note 13 Pro+ comes with a newer Android version out of the box.
Connectivity
Bluetooth5.25.3Redmi Note 13 Pro+ has slightly newer version for more efficient connections.
SIMDual Nano SIMDual Nano SIM + eSIMRedmi Note 13 Pro+ offers eSIM functionality.
Storage
Internal Storage128/256/512 GB256/512 GBBoth have sufficient storage options, but the S21 Ultra starts with less storage at 128GB.
RAM12/16 GB8/12/16 GBBoth offer enough RAM to suit user's needs.
Expandable StorageNoNoNeither allows additional storage.
Audio
QualityDolby Atmos, Hi-Res Audio, Noise cancellation microphoneDolby AtmosS21 Ultra has higher audio features, clearer calls and more immersive experience.
Security
FeaturesBasic Fingerprint sensorBasic Fingerprint sensorBoth phones have similar fingerprint sensors.

2. Key Differences Analysis

Samsung Galaxy S21 Ultra 5G Advantages:

  • Superior Display Sharpness: Higher resolution and pixel density provide a more detailed and crisp viewing experience.
  • More Versatile Camera System: Features a dedicated telephoto camera and optical zoom, enabling more creative shots and capturing distant subjects with clarity. It also supports 8k video.
  • More advanced audio: Hi-Res Audio and a noise cancellation microphone make for a higher-quality audio experience overall.
  • Wireless and Reverse Charging: Offers convenient wireless charging and the ability to charge other devices.
  • More complete sensor suite: Offers a barometer and other sensor information.

Practical Implications:

  • Content Creation & Photography: If you prioritize high-resolution images, detailed zoom capabilities, and advanced video options, the S21 Ultra is better suited.
  • Multimedia Consumption: For users who value the best image quality for movies, games, and everyday use.
  • Convenience: Those who appreciate wireless charging and the ability to charge other devices will prefer the S21 Ultra.

Xiaomi Redmi Note 13 Pro+ Advantages:

  • Significantly Faster Charging: The 120W charging is a major advantage, minimizing downtime.
  • Higher Display Brightness: Better visibility outdoors, making it easier to use in bright sunlight.
  • Slightly Better Benchmark Performance: The newer chipset offers marginally higher benchmark performance for smoother everyday use.
  • Newer OS: Ships with a newer version of Android, offering more features and security benefits.
  • Lighter and More Comfortable: Weighs significantly less making it comfortable to hold for extended periods.
  • eSIM Support: Offers the flexibility of using a digital SIM.
  • Marginally better camera performance according to DxoMark: Higher overall and video performance results.

Practical Implications:

  • On-the-Go Users: If you need rapid charging and bright display for outdoor use, Redmi Note 13 Pro+ is the better choice.
  • Budget-Conscious Users: This model offers great performance and features at a competitive price point.
  • Everyday Use: Ideal for social media, web browsing, and general productivity.

Trade-offs:

  • S21 Ultra: Sacrifices charging speed and portability for higher-end camera and display quality.
  • Redmi Note 13 Pro+: Offers faster charging and better outdoor visibility, but lacks the versatile camera system and high-resolution display found in the S21 Ultra.

3. User Profiles & Recommendations

Ideal User for Samsung Galaxy S21 Ultra 5G:

  • Photography Enthusiasts: Those who need advanced zoom capabilities, high-resolution images, and versatile shooting options.
  • Multimedia Lovers: Users who value a sharp, detailed display for consuming high-quality content.
  • Tech Enthusiasts: Users who appreciate the most advanced features and technology, even if they come with a trade-off.
  • Audiophiles: Users who appreciate higher quality audio playback, clear voice calls, and enhanced spatial audio.

Use Cases:

  • Professional photography and videography.
  • Watching high-resolution movies and playing demanding games.
  • Using the phone as a portable charging hub for other devices.

Ideal User for Xiaomi Redmi Note 13 Pro+:

  • Practical Users: Individuals who need a reliable phone with fast charging and bright outdoor visibility.
  • Budget-Conscious Buyers: Those seeking a good balance between performance and value.
  • On-the-Go Professionals: Users who need a fast-charging phone for long days and travel.
  • Users who use eSIM: Those who value the ability to switch between digital SIM carriers.

Use Cases:

  • Fast-paced daily routines where quick charging is essential.
  • Outdoor activities or work requiring a bright, legible display.
  • Everyday social media, browsing, and communication.

Price-to-Value Ratio:

  • The Redmi Note 13 Pro+ likely offers a higher price-to-value ratio, considering its faster charging, and newer OS for a more accessible price point.
  • The S21 Ultra offers higher-end features and capabilities, but this will likely come at a greater cost.

4. Decision Framework

Key Questions for Buyers:

  1. How important is fast charging to you? If you need quick top-ups, the Redmi Note 13 Pro+ is the clear winner. If this is not a main requirement, you can consider the S21 Ultra.
  2. How important is optical zoom and camera versatility? If you need multiple lenses, optical zoom, and high resolution photos, the S21 Ultra is the better choice. If you need quality photos and videos, the Redmi Note 13 Pro+ will suit your needs.
  3. What do you prioritize for daily usage? If you mainly use your phone indoors, the S21 Ultra may be preferable, but if you use your phone outdoors, the Redmi Note 13 Pro+ may be a better option.

Scenario-Based Recommendations:

  • Scenario 1: A user needs a phone for professional photography and video production.
    • Recommendation: Samsung Galaxy S21 Ultra 5G, due to its superior optical zoom capabilities and 8K video.
  • Scenario 2: A user travels frequently and needs a phone that can be quickly charged during short layovers.
    • Recommendation: Xiaomi Redmi Note 13 Pro+, due to its rapid 120W charging and eSIM.
  • Scenario 3: A user needs a phone with a high-quality display for watching movies and playing games and prioritizes the best picture quality possible.
    • Recommendation: Samsung Galaxy S21 Ultra 5G, due to its higher resolution and sharper display.
  • Scenario 4: A user needs a reliable phone for everyday tasks with a modern OS and good performance and wants great value.
    • Recommendation: Xiaomi Redmi Note 13 Pro+, due to its newer software, decent benchmark performance, and lower price point.

My Choice

If I were choosing, I would opt for the Xiaomi Redmi Note 13 Pro+. Here's why:

While the Samsung Galaxy S21 Ultra 5G boasts a more impressive display on paper and a more versatile camera system, the practical benefits of the Redmi Note 13 Pro+ are more compelling for my needs. I prioritize having a phone that can quickly top up its charge during a busy day, which is where the 120W charging makes a huge difference. Additionally, the newer OS and the slightly higher benchmark performance make the phone feel more up to date, despite the S21 being the more expensive flagship. The light weight is also a plus for everyday use.

Although I would enjoy the advanced photography capabilities of the S21 Ultra, the camera on the Redmi Note 13 Pro+ is still very capable, and the slightly better DXoMark scores are definitely impressive. The convenience of quick charging, a brighter display, and a more recent OS outweigh the benefits of the S21 Ultra for me personally.

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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  • Mobile technology analysis
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Bridging technical complexity with engaging, accessible narratives.