OnePlus 9 Pro vs Asus ROG Phone 8 - Detailed Phone Comparison

Detailed Comparison

Specification
OnePlus 9 Pro
OnePlus 9 Pro
Oneplus

General

Launch Date March 30, 2021 January 18, 2024
Release Year 2021 2024

Physical

Volume 104.5 cm³ 111.96 cm³
Screen Size to Weight Ratio 3.4 "/g 3.01 "/g
Weight 197 g 225 g
Height 163.2 mm 163.8 mm
Width 73.6 mm 76.8 mm
Thickness 8.7 mm 8.9 mm
Foldable Design No No
Available Colors
  • Forest Green
  • Morning Mist
  • Stellar Black
  • Phantom Black
  • Rebel Grey

Display

Screen Size 6.7 " 6.78 "
Resolution 1440 x 3216 1080 x 2400
Aspect Ratio 20:9 20:9
Screen-to-Body Ratio 89.9 % 88.2 %
Pixel Density 525 PPI 388 PPI
Refresh Rate 120 Hz 165 Hz
Typical Brightness N/A N/A
HBM Brightness N/A 1600 nits
Peak Brightness 1300 nits 2500 nits

Hardware

Battery Capacity per Screen Area 100.25 mAh/in² 119.65 mAh/in²
Battery Density 43.06 mAh/cm³ 49.12 mAh/cm³
Battery Capacity 4500 mAh 5500 mAh
NFC Support Yes Yes
Chipset Qualcomm SM8350 Snapdragon 888 5G (5 nm) Qualcomm SM8650-AB Snapdragon 8 Gen 3 (4 nm)
CPU Octa-core (1x2.84 GHz Cortex-X1 & 3x2.42 GHz Cortex-A78 & 4x1.80 GHz Cortex-A55 Octa-core (1x3.3 GHz Cortex-X4 & 3x3.2 GHz Cortex-A720 & 2x3.0 GHz Cortex-A720 & 2x2.3 GHz Cortex-A520)
GPU Adreno 660 Adreno 750

Connectivity

USB Version 3.1 N/A
OTG Support 1 1
DisplayPort 1
DisplayPort Version N/A 1.4
USB Features USB Type-C 3.1, OTG USB Type-C, OTG, DisplayPort 1.4, Bottom Port

Software

Operating System Android Android
Initial OS Version 11 14
Maximum OS Version 14 16

Comparison Summary

1. Specifications Comparison

Here's a detailed comparison of the OnePlus 9 Pro and Asus ROG Phone 8, focusing on practical implications:

Design

FeatureOnePlus 9 ProAsus ROG Phone 8Practical Impact
Dimensions163.2 × 73.6 × 8.7 mm163.8 × 76.8 × 8.9 mmROG Phone 8 is slightly larger, might be less comfortable for one-handed use for some users.
Weight197g225gOnePlus 9 Pro is noticeably lighter; more comfortable for extended use. The ROG Phone 8 will feel more substantial in hand.
BuildCorning Gorilla Glass Victus 2ROG Phone 8 is more durable, and will handle scratches better.

Display

FeatureOnePlus 9 ProAsus ROG Phone 8Practical Impact
Size6.7"6.78"Negligible difference in screen size, both are large-screen phones.
Resolution1440x32161080x2400OnePlus 9 Pro has a significantly sharper display. Text, images, and videos will appear clearer and more detailed.
Pixel Density525 PPI388 PPIOnePlus 9 Pro's higher PPI means much sharper images and text, very visible in direct comparison.
Technology-AMOLEDROG Phone 8's AMOLED display offers superior contrast, color vibrancy, and power efficiency, particularly with dark themes.
Refresh Rate120Hz165HzROG Phone 8 provides smoother animations and scrolling, especially noticeable in gaming.
Brightness1300 nits2500 nitsROG Phone 8 is dramatically brighter, offering better visibility in bright sunlight.

Performance

FeatureOnePlus 9 ProAsus ROG Phone 8Practical Impact
ChipsetQualcomm Snapdragon 888 5G (5nm)Qualcomm Snapdragon 8 Gen 3 (4nm)ROG Phone 8 has a much newer and more powerful chipset, resulting in faster performance, better gaming, and improved efficiency.
AnTuTu Score877,6002,020,000ROG Phone 8 shows much higher benchmark performance for smoother app loading, better multitasking, and much better gaming.
GPUAdreno 660Adreno 750ROG Phone 8's newer GPU offers a significant boost in graphics performance, resulting in better gaming visuals.

Battery

FeatureOnePlus 9 ProAsus ROG Phone 8Practical Impact
Capacity4500 mAh5500 mAhROG Phone 8's larger battery offers potentially longer battery life, but real-world endurance varies with use.
Charging65W Fast Charging65W Fast ChargingBoth phones charge quickly, reducing downtime.
FeaturesReverse Charging, 50W Wireless Charging, Reverse Wireless Charging-OnePlus 9 Pro offers versatile charging options which can be very helpful.

Camera

FeatureOnePlus 9 ProAsus ROG Phone 8Practical Impact
Standard Camera48MP (f/1.8, 1/1.43")50MP (f/1.9, 1/1.56")OnePlus 9 Pro has a slightly wider aperture and larger sensor, potentially better low-light performance, but the ROG Phone 8 has a newer sensor.
Selfie Camera16MP (f/2.4, 1/3.13")32MPROG Phone 8's higher resolution offers more detailed selfies.
Telephoto Lens8MP-OnePlus 9 Pro has dedicated telephoto zoom capabilities.
Wide Angle Lens50MP13MP (Wide Angle + Macro)OnePlus 9 Pro offers dedicated ultra-wide photos, whereas the ROG Phone 8 combines Wide Angle + Macro in one camera.
Macro Lens-5MPROG Phone 8 has dedicated macro capability for close-up shots.
Black & White Lens2MP-OnePlus 9 Pro offers a dedicated black and white sensor for specific photo styles.
Video RecordingUp to 8K@120fpsUp to 8K@24fpsBoth offer high-resolution video; the OnePlus 9 Pro has better fps options for slow motion.
Additional Camera FeaturesQuadruple Camera, Ultra Stable Video, PDAF, CDAF, RAW, RAW 12-bitTriple Camera, GimbalOnePlus 9 Pro offers more advanced photography, while the ROG Phone 8 has built in Gimbal like stabilization.
DXOMark122 (Mobile)-The OnePlus 9 Pro has a known DXOMark score, while the ROG Phone 8 hasn't been scored.

Software

FeatureOnePlus 9 ProAsus ROG Phone 8Practical Impact
OSAndroid 11 (upgradable to 14)Android 14 (upgradable to 16)ROG Phone 8 has a more modern Android version with longer software support.

Connectivity

FeatureOnePlus 9 ProAsus ROG Phone 8Practical Impact
WiFiWi-Fi 6 (802.11ax)Wi-Fi 7 (802.11be)ROG Phone 8 supports the newest Wi-Fi standard for faster speeds and better performance.
Bluetooth5.25.3ROG Phone 8 has newer Bluetooth tech, with improved features such as Apt-x Adaptive.
GPSGPS (L1+L5), GLONASS (L1), BeiDou (B1), Galileo (E1+E5a)A-GPS, GLONASS, Beidou, QZSS, GPS (L1+L5), GLONASS (L1), BeiDou (B1), Galileo (E1+E5a), BeiDou (B2), NavIC System, QZSS (L1 + L5)ROG Phone 8 has better location accuracy with additional satellite systems.

Storage

FeatureOnePlus 9 ProAsus ROG Phone 8Practical Impact
Internal Storage128 GB or 256 GB256 GBBoth phones have similar maximum storage, but OnePlus offers a smaller, cheaper option.
RAM8 GB or 12 GB12 GB or 16 GBROG Phone 8's higher RAM allows for smoother multitasking, especially in heavy gaming.
Expandable StorageNoNoNeither phone supports expandable storage.

Audio

FeatureOnePlus 9 ProAsus ROG Phone 8Practical Impact
Audio QualityDolby Atmos, Noise cancellation microphoneDTS / DTS XThe OnePlus 9 Pro offers a more comprehensive audio experience, while the ROG Phone 8 still provides high quality audio.

2. Key Differences Analysis

OnePlus 9 Pro Advantages:

  • Sharper Display: Higher resolution and PPI make for a noticeably crisper display, beneficial for detailed viewing.
  • Versatile Camera System: Offers a dedicated telephoto lens, a black and white sensor and a dedicated wide angle camera, providing greater photographic flexibility.
  • Wireless Charging: Supports both 50W wireless charging and reverse wireless charging, offering additional convenience.
  • Audio Quality: The OnePlus 9 Pro offers better audio, with Dolby Atmos.
  • Lighter and Thinner: More comfortable for extended handheld use.

Asus ROG Phone 8 Advantages:

  • Superior Performance: The Snapdragon 8 Gen 3 chipset and Adreno 750 GPU offer significantly better performance for all tasks, especially gaming.
  • Smoother Display: Higher 165Hz refresh rate results in smoother animations and less blur, advantageous in gaming.
  • Brighter Display: Significantly higher brightness is crucial for good visibility in bright outdoor conditions.
  • Longer Battery Life: Larger battery capacity extends usage time between charges.
  • Better Connectivity: Supports the newest WiFi 7 and Bluetooth 5.3 standards, offering faster and more reliable wireless connections.
  • More Modern Software: Runs on a more recent version of Android (14), with an upgrade path to Android 16.

Trade-offs:

  • OnePlus 9 Pro sacrifices performance and modern connectivity for a sharper display and better charging features.
  • Asus ROG Phone 8 sacrifices the versatile camera system for a significantly more powerful processor and better battery life.

3. User Profiles & Recommendations

OnePlus 9 Pro Ideal User:

  • Visual Content Consumer: Users who prioritize a high-resolution display for sharp and detailed viewing of text and images, and are not too interested in high gaming performance.
  • Photography Enthusiasts: Those who want versatile camera capabilities with multiple lens options and RAW capture.
  • Convenience-Focused Users: Users who value wireless and reverse wireless charging options for convenience.

Specific Use Cases:

  • Reading eBooks and articles on a high-resolution screen.
  • Capturing a variety of photos with dedicated telephoto and wide angle lenses.
  • Charging accessories using the phone's reverse wireless charging.

Asus ROG Phone 8 Ideal User:

  • Mobile Gamers: Players who need top-tier performance, smooth frame rates, and a responsive display for competitive gaming.
  • Heavy Users: Individuals who need long battery life and fast performance for all tasks.
  • Power Users: Those who prioritize cutting-edge technology and the latest software version.
  • Outdoor Users: Those who need a bright display that is easily visible in direct sunlight.

Specific Use Cases:

  • Playing demanding mobile games at high settings without lag.
  • Using the phone for prolonged periods without needing to recharge.
  • Taking the phone outdoors for bright sunlight use.

Price-to-Value Ratio

The pricing of these phones may vary significantly based on your location and any active deals. This makes the price-to-value ratio more subjective. However:

  • OnePlus 9 Pro: Offers good value to those who want a very good camera and display without paying top dollar for the absolute best performance, given that it's a few years older.
  • Asus ROG Phone 8: Justifies its higher price tag with significantly superior performance and future-proof tech, targeting users who need the most capable device.

4. Decision Framework

Key Questions for Buyers:

  1. What's your primary use case? (e.g., gaming, photography, media consumption).
  2. How important is top-tier performance vs. camera versatility?
  3. Is having the latest technology a must-have?

Scenario-Based Recommendations:

  • Scenario 1: Photography is the priority.

    • Recommendation: The OnePlus 9 Pro offers a much more versatile camera system that covers more angles.
  • Scenario 2: Mobile Gaming is the priority.

    • Recommendation: The Asus ROG Phone 8 is a clear winner due to its superior performance, higher refresh rate display, and larger battery.
  • Scenario 3: Daily all-round usage and longevity are key.

    • Recommendation: The Asus ROG Phone 8 offers a more future-proof experience with its higher performance, brighter screen, and newer software.
  • Scenario 4: Budget is a concern.

    • Recommendation: If price is a concern, the OnePlus 9 Pro is likely to be significantly cheaper, but at the cost of overall performance.

My Choice

If I were choosing between these two phones, I would pick the Asus ROG Phone 8. While the OnePlus 9 Pro offers a very sharp display and more camera versatility, the ROG Phone 8's overall performance, significantly longer battery life, and the more modern software make it a better choice for my usage. My priority is smooth performance, future-proofing, and great connectivity. I am also not a prolific photographer so the additional versatility of the OnePlus is less useful to me. Although the ROG Phone 8 doesn't have a dedicated telephoto lens, its other advantages outweigh that particular con. The ROG Phone 8's better brightness also makes it more suitable for outdoor usage. In the end, the better overall experience, combined with higher refresh rate and vastly better performance, make the ROG Phone 8 more compelling than the OnePlus 9 Pro.

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.