Xiaomi 13 Ultra vs Asus ROG Phone 8 - Detailed Phone Comparison

Detailed Comparison

Specification

General

Launch Date April 21, 2023 January 18, 2024
Release Year 2023 2024

Physical

Volume 110.79 cm³ 111.96 cm³
Screen Size to Weight Ratio 2.96 "/g 3.01 "/g
Weight 227 g 225 g
Height 163.2 mm 163.8 mm
Width 74.6 mm 76.8 mm
Thickness 9.1 mm 8.9 mm
Foldable Design No No
Available Colors
  • Black
  • Yellow
  • Blue
  • White
  • Orange
  • Olive Green
  • Phantom Black
  • Rebel Grey

Display

Screen Size 6.73 " 6.78 "
Resolution 1440 x 3200 1080 x 2400
Aspect Ratio 20:9 20:9
Screen-to-Body Ratio 89.8 % 88.2 %
Pixel Density 522 PPI 388 PPI
Refresh Rate 120 Hz 165 Hz
Typical Brightness N/A N/A
HBM Brightness 1300 nits 1600 nits
Peak Brightness 2600 nits 2500 nits

Hardware

Battery Capacity per Screen Area 110.39 mAh/in² 119.65 mAh/in²
Battery Density 45.13 mAh/cm³ 49.12 mAh/cm³
Battery Capacity 5000 mAh 5500 mAh
NFC Support Yes Yes
Chipset Qualcomm SM8550-AB Snapdragon 8 Gen 2 (4 nm) Qualcomm SM8650-AB Snapdragon 8 Gen 3 (4 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 (1x3.3 GHz Cortex-X4 & 3x3.2 GHz Cortex-A720 & 2x3.0 GHz Cortex-A720 & 2x2.3 GHz Cortex-A520)
GPU Adreno 740 Adreno 750

Connectivity

USB Version 3.2 N/A
OTG Support 1 1
DisplayPort 1 1
DisplayPort Version N/A 1.4
USB Features USB Type-C 3.2, OTG, DisplayPort USB Type-C, OTG, DisplayPort 1.4, Bottom Port

Software

Operating System Android Android
Initial OS Version 13 14
Maximum OS Version 14 16

Comparison Summary

1. Specifications Comparison

FeatureXiaomi 13 UltraAsus ROG Phone 8Practical Impact
Design
Dimensions (mm)163.2 x 74.6 x 9.1163.8 x 76.8 x 8.9ROG Phone 8 slightly larger and wider.
Weight (g)227225Negligible weight difference.
BuildMaterial information missing for both phones, impacting durability and premium feel perception.
Display
Size (inches)6.736.78ROG Phone 8 marginally larger.
Resolution1440 x 32001080 x 2400Significantly sharper and more detailed visuals on the Xiaomi 13 Ultra due to higher pixel density (522 vs 388 PPI).
Refresh Rate (Hz)120165Smoother animations and transitions on the ROG Phone 8, especially noticeable in gaming and fast-paced content.
Display TypeLTPO AMOLEDLTPO AMOLEDBoth offer excellent contrast and vibrant colors.
Peak Brightness (nits)26002500Xiaomi 13 Ultra slightly brighter in direct sunlight.
Color Depth68B1BROG Phone 8 boasts a wider color gamut, potentially offering more nuanced color representation.
HDRDolby Vision, HDR10+HDR10Xiaomi 13 Ultra supports more HDR formats for a superior HDR viewing experience.
Performance
ChipsetSnapdragon 8 Gen 2Snapdragon 8 Gen 3ROG Phone 8 features a newer generation chipset, likely resulting in faster processing speeds and improved graphics performance.
CPUOcta-core (up to 3.2 GHz)Octa-core (up to 3.3 GHz)ROG Phone 8 has a slightly faster CPU clock speed.
GPUAdreno 740Adreno 750ROG Phone 8's newer GPU should deliver better gaming and graphics-intensive task performance.
RAM12GB16GBROG Phone 8 offers more RAM, enabling better multitasking and handling of demanding applications.
Camera
Main Camera (MP)5050Both have high-resolution main sensors.
Sensor Size1" (Xiaomi)1/1.56" (Asus)Significantly larger sensor on Xiaomi 13 Ultra, capturing more light and detail, especially in low-light conditions.
Other Cameras3 x 50MP Telephoto & Wide13MP Wide, 5MP MacroXiaomi offers more versatile telephoto capabilities; ROG Phone 8 includes a dedicated macro lens.
Battery
Capacity (mAh)50006000Larger battery capacity in the ROG Phone 8, potentially translating to longer battery life.

2. Key Differences Analysis

Xiaomi 13 Ultra Advantages:

  • Superior Display Sharpness: Significantly higher pixel density for crisper visuals.
  • More Versatile Camera System: Leica-tuned lenses and a larger main sensor with multiple telephoto options for exceptional photography.
  • Brighter Display: Better visibility in direct sunlight.
  • Wider HDR Support: More immersive HDR experience with Dolby Vision.

Asus ROG Phone 8 Advantages:

  • Faster Performance: Newer generation processor and GPU for smoother gaming and demanding tasks.
  • Higher Refresh Rate Display: Ultra-smooth visuals, ideal for gaming and fast-paced content.
  • Larger Battery: Potentially longer battery life.
  • More RAM: Better for multitasking and demanding applications.
  • Lower Price: Offers competitive specifications at a more affordable price point.

3. User Profiles & Recommendations

Xiaomi 13 Ultra: Ideal for photography enthusiasts, professionals, and users who prioritize display quality and a premium camera experience.

Asus ROG Phone 8: Best suited for mobile gamers, power users who demand top-tier performance, and those seeking a longer-lasting battery.

4. Decision Framework

Key Questions for Buyers:

  1. What is your primary use case? (Photography, gaming, general use)
  2. What is your budget? (High-end vs. mid-range)
  3. Which features are most important to you? (Camera quality, performance, battery life, display)

Scenario-Based Recommendations:

  • Photography Enthusiast: Xiaomi 13 Ultra
  • Hardcore Mobile Gamer: Asus ROG Phone 8
  • Balanced User on a Budget: Asus ROG Phone 8

My Choice: Xiaomi 13 Ultra

While the ROG Phone 8 offers tempting performance and a lower price, the Xiaomi 13 Ultra's superior camera system and stunning display are decisive factors for me. I prioritize image quality and a sharp, vibrant screen for everyday use and content consumption. The larger sensor and Leica collaboration on the 13 Ultra promise a significant advantage in photography, which is a key consideration for me. Although the ROG Phone 8 boasts a newer chipset, the Snapdragon 8 Gen 2 in the 13 Ultra is still incredibly powerful and more than sufficient for my needs. The price difference is substantial, but the 13 Ultra's camera and display quality justify the premium for my personal preferences.

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:

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Bridging technical complexity with engaging, accessible narratives.