Xiaomi Redmi Note 9T vs Realme C51 - Detailed Phone Comparison

Detailed Comparison

Specification
Realme C51
Realme C51
Realme

General

Launch Date January 18, 2021 August 1, 2023
Release Year 2021 2023

Physical

Volume 113.39 cm³ 102.59 cm³
Screen Size to Weight Ratio 3.28 "/g 3.62 "/g
Weight 199 g 186 g
Height 161.2 mm 167.2 mm
Width 77.3 mm 76.7 mm
Thickness 9.1 mm 8 mm
Foldable Design No No
Available Colors
  • Nightfall Black
  • Daybreak Purple
  • Mint Green
  • Carbon Black

Display

Screen Size 6.53 " 6.74 "
Resolution 1080 x 2340 720 x 1600
Aspect Ratio 19.5:9 20:9
Screen-to-Body Ratio 84 % 85.5 %
Pixel Density 395 PPI 260 PPI
Refresh Rate N/A 90 Hz
Typical Brightness 450 nits N/A
HBM Brightness N/A N/A
Peak Brightness N/A 560 nits

Hardware

Battery Capacity per Screen Area 117.26 mAh/in² 110.07 mAh/in²
Battery Density 44.09 mAh/cm³ 48.74 mAh/cm³
Battery Capacity 5000 mAh 5000 mAh
NFC Support Yes Yes
Chipset Mediatek Dimensity 800U (7 nm) Unisoc Tiger T612 (12 nm)
CPU Octa-core (2x2.4 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55) Octa-core (2x1.8 GHz Cortex-A75 & 6x1.8 GHz Cortex-A55)
GPU Mali-G57 MC3 Mali-G57

Connectivity

USB Version 2.0 2.0
OTG Support 1
DisplayPort
DisplayPort Version N/A N/A
USB Features USB Type-C 2.0 USB Type-C 2.0, OTG

Software

Operating System Android Android
Initial OS Version 10 13
Maximum OS Version

Comparison Summary

Smartphone Comparison: Xiaomi Redmi Note 9T vs. Realme C51

1. Specifications Comparison

FeatureXiaomi Redmi Note 9TRealme C51Practical Impact
Design
Dimensions161.2 × 77.3 × 9.1 mm167.2 × 76.7 × 8 mmRedmi Note 9T is slightly shorter and thicker, while the C51 is taller and thinner; C51 might feel more modern with a thinner profile.
Weight199g186gRealme C51 is lighter, potentially more comfortable for extended use.
Display
Size6.53"6.74"Realme C51 offers slightly more screen real estate for media consumption and browsing.
Resolution1080x2340720x1600Redmi Note 9T has a much sharper display with more detail, better for reading, gaming, and general clarity.
Pixel Density (PPI)395260Redmi Note 9T's higher pixel density results in crisper text and images, noticeable to the naked eye.
TechnologyIPS LCDIPS LCDSimilar display tech means color reproduction and viewing angles will be comparable.
Refresh Rate60Hz90HzRealme C51 offers slightly smoother scrolling and animations.
Brightness0 nits0 nitsBrightness is identical, so visibility in sunlight should be similar, although "0 nits" is likely a placeholder and not the actual brightness of the displays.
Performance
ChipsetMediatek Dimensity 800U (7 nm)Unisoc Tiger T612 (12 nm)Redmi Note 9T's chip offers significantly better performance for demanding apps, gaming, and multitasking, based on the architecture and benchmark scores.
AnTuTu Score343,150220,000Redmi Note 9T demonstrates higher benchmark performance, translating to a snappier and more responsive user experience.
GPUMali-G57 MC3Mali-G57 MP1Redmi Note 9T’s more powerful GPU will handle graphics-intensive tasks and games much better.
Camera
Main Camera48MP, f/1.79, 1/2" sensor50MP, f/1.8, 1/2.76" sensorRedmi Note 9T has a larger sensor with a wider aperture, potentially capturing more light and detail, especially in low-light conditions. While C51 has higher MP, the sensor size in the 9T is more impactful.
Selfie Camera13MP, f/2.25, 1/3.1" sensor5MP, f/2.2, 1/5" sensorRedmi Note 9T's selfie camera will produce much higher quality selfies, with more detail and potentially better low-light performance, also the sensor size is larger.
Additional Cameras2MP Depth, 2MP MacroNoneRedmi Note 9T offers more versatile photography options, though 2MP sensors are not very impactful.
Video RecordingUp to 4K@30fpsUp to 1080p@30fpsRedmi Note 9T is capable of recording in much higher resolution, making it suitable for better quality videos.
Battery
Capacity5000mAh5000mAhBoth phones have the same battery capacity, which suggests similar battery life.
Charging18W Fast Charging33W Fast ChargingRealme C51 charges much faster, reducing downtime and increasing convenience.
Charger in box22.5WCharger not specifiedRedmi Note 9T includes a faster charger than its charging capability.
Software & Connectivity
OSAndroid 10Android 13Realme C51 has a newer OS version, likely offering better features and security updates.
WiFi802.11 a/b/g/n/ac802.11 a/b/g/n/ac with MiMOBoth phones offer similar wifi standards, but C51 offers additional MiMO technology.
Bluetooth5.1 LE5.0 LERedmi Note 9T uses a newer Bluetooth version offering slightly improved efficiency and connection stability.
GPSGPS, A-GPS, Galileo, GLONASS (L1)GPS, A-GPS, GLONASS, GalileoBoth phones offer similar GPS capabilities.
Storage & Audio
Internal Storage64GB/128GB64GB/128GB/256GBRealme C51 offers more storage with 256GB max.
RAM4GB4GB/6GBRealme C51 has 6GB option, which allows for smoother multitasking.
Expandable StorageNoNoNeither phone allows for expandable storage.
Audio QualityHi-Res Audio, Stereo SpeakersNoise cancellation microphoneRedmi Note 9T offers a better audio experience with stereo speakers, which allows for better audio immersion.
Other
SecuritySide-mounted fingerprint sensorSide-mounted fingerprint sensorBoth phones offer similar security features using fingerprint sensor.
BuildCorning Gorilla Glass 5UnknownRedmi Note 9T is more durable due to the screen protection.
SensorsFingerprint, Accelerometer, Compass, Gyroscope, Ultrasonic proximityFingerprint, Accelerometer, ProximityRedmi Note 9T has more sensors that allows for advanced functionality.

2. Key Differences Analysis

Xiaomi Redmi Note 9T Advantages:

  • Superior Performance: The Dimensity 800U chipset significantly outperforms the Unisoc T612, resulting in smoother operation, faster app loading, and better gaming capabilities.
  • Higher Resolution Display: The 1080p screen is much sharper than the 720p display on the C51, resulting in a much better visual experience.
  • Better Cameras: Larger sensors, wider apertures, and higher resolution on both front and back cameras, resulting in overall better image quality. It includes depth and macro lens for versatility.
  • Better Audio Experience: Stereo speakers allow for immersive sound, making the phone better for multimedia consumption.
  • More Durable: Corning Gorilla Glass 5 screen protection is missing on C51.
  • More Sensors: Offers a more comprehensive set of sensors (Compass, Gyroscope, Ultrasonic proximity) than Realme C51.

Realme C51 Advantages:

  • Newer OS: Comes with Android 13 out of the box, providing better software features and security updates.
  • Faster Charging: 33W fast charging significantly reduces charging times.
  • Larger Display: The slightly bigger display offers more screen space.
  • More Storage Options: Offers a higher 256GB storage configuration.
  • More RAM Options: Offers a 6GB RAM option, useful for multitasking.
  • Wi-Fi MiMO support: Provides faster and more reliable Wi-Fi connections.
  • Noise cancellation microphone: Ensures clearer audio during calls.

Trade-offs:

  • The Redmi Note 9T prioritizes performance, display quality, and camera capabilities, but is older, runs an older OS, and has slower charging.
  • The Realme C51 provides a newer software experience and faster charging but sacrifices display resolution, processing power, and camera quality compared to the Redmi Note 9T.

3. User Profiles & Recommendations

Xiaomi Redmi Note 9T Ideal User:

  • Power Users: Individuals who prioritize performance for gaming, demanding applications, and multitasking.
  • Media Consumers: Users who watch a lot of videos or enjoy visual content, and want a sharp, high-resolution display.
  • Photography Enthusiasts: Users who appreciate better camera hardware and want more versatile photo and video options, and are happy to deal with the less updated software.
  • Users Who Value Audio: Users that care about audio quality and want a phone with good speakers.

Specific Use Cases for Redmi Note 9T:

  • Gaming: The powerful processor and GPU provide a better gaming experience than the C51.
  • Media Creation: 4K video recording and better camera hardware make it a good option for creating social media content.
  • Daily Productivity: Smooth multitasking and responsiveness make it suitable for work and personal tasks.
  • Multimedia Consumption: The sharp display and stereo speakers offer a better experience for watching movies and shows.

Realme C51 Ideal User:

  • Budget-Conscious Buyers: Individuals looking for a modern smartphone with essential features at a lower cost.
  • Casual Users: Those who primarily use their phone for browsing, social media, and basic tasks.
  • Users that prioritize battery and charging: Users who want quick charging times and battery life for the day.
  • Users that want the latest Android version: Users who want the newest software features and updates.

Specific Use Cases for Realme C51:

  • Everyday Communication: Perfect for calls, messages, and social media usage.
  • Light Browsing: Suitable for web surfing and checking emails.
  • Media Playback: The larger display is okay for watching videos, although the resolution is lower.
  • Longer battery life: The quick charging and similar capacity to the 9T might result in better overall battery performance.

4. Decision Framework

Key Questions for Buyers:

  1. What is your primary use case? (Gaming, social media, photography, etc.)
  2. How important is display quality? (Do you need sharp details, or is a larger size more important?)
  3. How important is fast charging? (Do you need to quickly charge your phone multiple times a day?)

Scenario-Based Recommendations:

  • If you are a gamer, power user or care about camera quality, choose the Xiaomi Redmi Note 9T. It offers a better experience in terms of processing power, screen quality and camera quality.
  • If you are looking for a newer phone, with faster charging, and more storage options, choose the Realme C51. It is suitable for day-to-day tasks, with a newer OS and bigger display.
  • If you are on a tight budget, choose the Realme C51. It offers a more up-to-date experience, although it lacks some performance features from the 9T.

My Choice

I would choose the Xiaomi Redmi Note 9T. Although it is the older device and has an older Android version, it performs significantly better, with a much better screen, much better main and selfie camera, and a better audio system. These factors are more important to me than the slightly faster charging and newer OS of the Realme C51. The performance gap, screen quality and camera quality differences are significant, and are more likely to improve my daily experience.

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.