Xiaomi 13 Ultra vs Realme 12x - Detailed Phone Comparison

Detailed Comparison

Specification
Realme 12x
Realme 12x
Realme

General

Launch Date April 21, 2023 April 7, 2024
Release Year 2023 2024

Physical

Volume 110.79 cm³ 99.56 cm³
Screen Size to Weight Ratio 2.96 "/g 3.51 "/g
Weight 227 g 190 g
Height 163.2 mm 165.6 mm
Width 74.6 mm 76.1 mm
Thickness 9.1 mm 7.9 mm
Foldable Design No No
Available Colors
  • Black
  • Yellow
  • Blue
  • White
  • Orange
  • Olive Green
  • Glowing Black
  • Feather Green

Display

Screen Size 6.73 " 6.67 "
Resolution 1440 x 3200 720 x 1604
Aspect Ratio 20:9 20:9
Screen-to-Body Ratio 89.8 % 85.1 %
Pixel Density 522 PPI 264 PPI
Refresh Rate 120 Hz 120 Hz
Typical Brightness N/A N/A
HBM Brightness 1300 nits 625 nits
Peak Brightness 2600 nits N/A

Hardware

Battery Capacity per Screen Area 110.39 mAh/in² 112.39 mAh/in²
Battery Density 45.13 mAh/cm³ 50.22 mAh/cm³
Battery Capacity 5000 mAh 5000 mAh
NFC Support Yes Yes
Chipset Qualcomm SM8550-AB Snapdragon 8 Gen 2 (4 nm) Mediatek Dimensity 6100+ (6 nm)
CPU Octa-core (1x3.2 GHz Cortex-X3 & 2x2.8 GHz Cortex-A715 & 2x2.8 GHz Cortex-A710 & 3x2.0 GHz Cortex-A510) Octa-core (2x2.2 GHz Cortex-A76 & 6x2.0 GHz Cortex-A55)
GPU Adreno 740 Mali-G57 MC2

Connectivity

USB Version 3.2 2.0
OTG Support 1
DisplayPort 1
DisplayPort Version N/A N/A
USB Features USB Type-C 3.2, OTG, DisplayPort USB Type-C 2.0

Software

Operating System Android Android
Initial OS Version 13 14
Maximum OS Version 14

Comparison Summary

1. Specifications Comparison

FeatureXiaomi 13 UltraRealme 12xPractical Impact
Design
Dimensions (mm)163.2 x 74.6 x 9.1165.6 x 76.1 x 7.9The Realme 12x is slightly larger but thinner and noticeably lighter. The Xiaomi might feel more premium due to implied build materials but could be less comfortable for one-handed use.
Weight (g)227190The significant weight difference will be noticeable in daily use. The Realme will be more comfortable for extended use and portability.
Display
Display Type6.73" LTPO AMOLED6.67" IPS LCDThe Xiaomi offers superior contrast, deeper blacks, and potentially better power efficiency due to LTPO technology. Its higher resolution results in significantly sharper visuals. The Realme's LCD might offer better visibility in direct sunlight.
Resolution1440 x 3200720 x 1604A massive difference in sharpness. The Xiaomi's display will be far superior for media consumption, gaming, and overall clarity. The Realme's 720p resolution is noticeably pixelated on a screen this size.
Refresh Rate120Hz120HzBoth offer smooth scrolling and animations.
Peak Brightness2600 nits625 nitsThe Xiaomi will be far more visible in bright sunlight.
Performance
ChipsetSnapdragon 8 Gen 2Dimensity 6100+The Snapdragon 8 Gen 2 is a flagship processor, offering significantly better performance in demanding tasks like gaming, video editing, and multitasking compared to the mid-range Dimensity 6100+.
CPUOcta-core (1x3.2 GHz Cortex-X3 & ...)Octa-core (2x2.2 GHz Cortex-A76 & ...)The Xiaomi's CPU architecture offers a higher clock speed and more powerful cores, translating to a much faster and more responsive user experience.
GPUAdreno 740Mali-G57 MC2The Adreno 740 is considerably more powerful, delivering a smoother gaming experience and better performance in graphics-intensive applications.
RAM12GB8GBBoth offer ample RAM for multitasking, but the Xiaomi provides more headroom for future-proofing and demanding applications.
Camera
Main Camera50MP Sony IMX989 (1")50MP ISOCELLThe Xiaomi boasts a much larger sensor (1"), significantly improving low-light performance and dynamic range. The specific ISOCELL sensor in the Realme isn't listed, making detailed comparison difficult.
Additional CamerasTriple Camera: Wide, Telephoto, Periscope TelephotoDual Camera: Depth SensorThe Xiaomi offers far more versatile camera options with high-quality lenses for various shooting scenarios.
Battery
Capacity5000 mAh5000 mAhSimilar battery capacities suggest comparable battery life, but real-world usage will depend on software optimization and display power consumption. The Xiaomi's LTPO display might provide better efficiency.
Charging SpeedNot specifiedNot specifiedCharging speed comparison is impossible without specific data.

2. Key Differences Analysis

Xiaomi 13 Ultra Advantages:

  • Significantly superior display: Higher resolution, AMOLED technology, LTPO for better power efficiency, and much higher peak brightness.
  • Flagship Performance: Much faster processor, GPU, and more RAM for a smooth and responsive experience in demanding tasks.
  • Versatile and High-Quality Camera System: Larger main sensor, Leica lenses, and multiple telephoto options for a premium photography experience.

Realme 12x Advantages:

  • Lighter and Thinner: Noticeably more comfortable for one-handed use and portability.
  • Significantly Lower Price: Offers good value for basic smartphone needs.

Trade-offs:

  • The Xiaomi's premium features come at a significantly higher price.
  • The Realme compromises on display quality, performance, and camera capabilities for affordability.

3. User Profiles & Recommendations

Xiaomi 13 Ultra: Ideal for users who demand the best possible smartphone experience, prioritize photography, gaming, and media consumption, and are willing to pay a premium price.

Realme 12x: Suitable for budget-conscious users who prioritize basic smartphone functionalities like calling, texting, social media browsing, and light gaming.

4. Decision Framework

Key Questions for Buyers:

  1. What is your budget? The price difference is substantial.
  2. What are your primary smartphone usage patterns? (e.g., photography, gaming, social media)
  3. How important are display quality, performance, and camera capabilities to you?

Scenario-Based Recommendations:

  • Photography Enthusiast: Xiaomi 13 Ultra
  • Gamer: Xiaomi 13 Ultra
  • Budget-Conscious User: Realme 12x
  • Casual User Primarily for Communication and Social Media: Realme 12x

My Choice: Xiaomi 13 Ultra

While the Realme 12x offers good value for its price, the Xiaomi 13 Ultra is the clear winner for me. I prioritize a high-quality display, smooth performance, and a versatile camera system. The significant improvements in these areas, especially the leap in display and camera quality, justify the higher price for my usage. I'm willing to pay a premium for a device that delivers a truly flagship experience. The weight difference is a minor concern compared to the substantial gains in other aspects. The Realme 12x serves a specific niche for budget-conscious buyers, but it doesn't meet my personal requirements.

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.