OnePlus 9 Pro vs Asus Zenfone 11 Ultra - Detailed Phone Comparison

Detailed Comparison

Specification
OnePlus 9 Pro
OnePlus 9 Pro
Oneplus

General

Launch Date March 30, 2021 April 14, 2024
Release Year 2021 2024

Physical

Volume 104.5 cm³ 111.96 cm³
Screen Size to Weight Ratio 3.4 "/g 3.03 "/g
Weight 197 g 224 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
  • Eternal Black
  • Skyline Blue
  • Misty Gray
  • Desert Sand

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 144 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
DisplayPort
DisplayPort Version N/A N/A
USB Features USB Type-C 3.1, OTG USB Type-C

Software

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

Comparison Summary

1. Specifications Comparison

Design

FeatureOnePlus 9 ProAsus Zenfone 11 UltraPractical Impact
Dimensions163.2 × 73.6 × 8.7 mm163.8 × 76.8 × 8.9 mmAsus is slightly larger; might feel bulkier in hand and pocket.
Weight197g224gOnePlus is noticeably lighter; more comfortable for extended use.
Build MaterialNot specifiedNot specifiedImpact on overall feel, durability, and aesthetics. Further info needed to determine implications

Display

FeatureOnePlus 9 ProAsus Zenfone 11 UltraPractical Impact
Size6.7"6.78"Negligible difference in screen real estate; both are large.
Resolution1440x32161080x2400OnePlus has sharper text and images; better for detailed content viewing.
PPI525388OnePlus has noticeably higher pixel density; resulting in a sharper image.
TechnologyNot SpecifiedAMOLEDAsus offers superior contrast, deeper blacks, better power efficiency with dark themes.
Refresh Rate120Hz144HzAsus provides slightly smoother animations, especially noticeable in fast-paced content and gaming.
Brightness1300 nits2500 nitsAsus is much better for outdoor use in bright sunlight, ensuring screen visibility.
Screen ProtectionCorning Gorilla Glass 5Corning Gorilla Glass Victus 2Asus provides superior scratch and drop protection.

Performance

FeatureOnePlus 9 ProAsus Zenfone 11 UltraPractical Impact
ChipsetQualcomm SM8350 Snapdragon 888 5G (5 nm)Qualcomm SM8650-AB Snapdragon 8 Gen 3 (4 nm)Asus offers significantly faster processing and better power efficiency; smoother performance in demanding tasks.
AnTuTu Score877,6001,532,000Asus provides superior overall performance; faster app loading, smoother multitasking, better gaming performance.
GPUAdreno 660Adreno 750Asus provides better graphics rendering; smoother gameplay with higher frame rates, better graphics for demanding applications.

Battery

FeatureOnePlus 9 ProAsus Zenfone 11 UltraPractical Impact
Capacity4500mAh5500mAhAsus is likely to last significantly longer on a single charge, providing a full day of use even with heavy usage.
Charging65W fast charging65W fast chargingBoth phones can charge rapidly, minimizing downtime.
Other FeaturesReverse charging, Wireless charging 50W, REverse wireless charging15W wireless charging, 10W reverse wiredOnePlus offers faster wireless charging and reverse wireless charging, while Asus includes wired reverse charging

Camera

FeatureOnePlus 9 ProAsus Zenfone 11 UltraPractical Impact
Main Camera48MP, f/1.8, 1/1.43" sensor50MP, f/1.9, 1/1.56" sensorSimilar quality, but OnePlus's larger sensor might capture slightly more light in low-light; Both offer great image quality, but will differ in specific performance depending on environment
Selfie Camera16MP, f/2.4, 1/3.13" sensor32MP, f/2.5, 1/3.2" sensorAsus has higher resolution, but OnePlus has a wider aperture for slightly better low light, Both offer good quality for selfies
Telephoto Lens8MP, f/2.4, 1/4.4" sensor32MP, f/2.4Asus has a significantly higher resolution, better zoom capabilities, leading to more detail in zoomed-in photos.
Wide-Angle Lens50MP, f/2.2, 1/1.56" sensor13MP, f/2.2, 1.12 µm pixel sizeOnePlus has much higher resolution, better quality for ultrawide shots.
Black & White Lens2MP, f/2.4Not includedOnePlus has a dedicated black and white sensor for artistic shots with good light
Video Recording8K@30fps, 4K@120fps8K@24fps, 4K@60fpsBoth phones provide similar video capabilities, but OnePlus offers higher frame rate in 4K. Both offer high quality, stabilized video recording
DxOMark ScoreMain: 122, Photo: 124, Video: 118Main: 125, Photo: 131, Video: 115Asus has better photo score but slightly lower video performance. Differences are marginal for most casual users.
Camera FeaturesQuadruple Camera, Optical Zoom, Laser AF, Night ModeTriple Camera, Gimbal, PDAF OmnidericionalOnePlus provides greater flexibility with its versatile setup; Asus offers additional stabilization through gimbal and omnidirectional autofocus.

Other Features

FeatureOnePlus 9 ProAsus Zenfone 11 UltraPractical Impact
OSAndroid 11 (Upgradable to 14)Android 14 (Upgradable to 16)Asus offers a more modern operating system and potentially longer software support, which can provide performance and features improvements.
Wi-FiWi-Fi 6Wi-Fi 7Asus has superior Wi-Fi speeds, better performance in crowded networks.
Bluetooth5.25.4Asus has slightly newer version, offering slightly faster speeds and reduced power usage
GPSMultiple systems (L1+L5)Multiple systems (L1+L5), QZSS, NavICAsus provides slightly more accurate positioning for navigation.
Internal Storage128/256 GB256/512 GBAsus offers larger storage options for storing media and apps.
RAM8/12 GB12/16 GBAsus can handle more apps running in the background, improving multitasking.
Expandable StorageNoNoBoth phones do not have the ability to add external storage.
AudioDolby Atmos, 3 MicrophonesHi-Res Audio, 2 MicrophonesOnePlus provides enhanced spatial audio and better voice capture; Asus provides Hi-Res audio. Differences are subjective
SecurityBasic Fingerprint SensorBasic Fingerprint SensorBasic biometric security; both phones have similar functionality.
Build QualityCorning Gorilla Glass 5Corning Gorilla Glass Victus 2Asus provides superior scratch and drop protection.
SensorsAccelerometer, Compass, Gyroscope, ProximityAccelerometer, Compass, Gyroscope, Proximity, HallAsus has an additional Hall Sensor for added functionalities such as smart covers

2. Key Differences Analysis

OnePlus 9 Pro Advantages:

  • Lighter and more compact: Easier to handle and carry.
  • Sharper Display: Higher resolution and pixel density for detailed viewing.
  • More versatile main camera, and wider angle lens: More versatile camera options with higher resolution and light sensitivity
  • Faster Wireless Charging Offers much faster wireless charging options.
  • Dolby Atmos and 3 Microphones Providing more immersive audio experience.

Practical Implications: The OnePlus 9 Pro is more comfortable for prolonged use, great for those who value display clarity, better for artistic photography, and convenient wireless charging.

Asus Zenfone 11 Ultra Advantages:

  • Significantly better performance: The Snapdragon 8 Gen 3 chipset offers far superior processing power.
  • Longer Battery Life: The larger battery will last longer, suitable for heavy users.
  • Superior Display Technology: AMOLED screen offers vibrant colors and deep blacks.
  • Brighter Screen: Much better visibility in bright sunlight.
  • Significantly better Telephoto Lens Superior zoom capabilities and resolution.
  • Latest OS: Comes with a newer version of Android and will receive updates for a longer period of time.
  • Better Connectivity: Faster Wi-Fi and newer Bluetooth technology for enhanced speed and connection stability
  • Higher base storage options: For those who need more space to store files.
  • More RAM Better multitasking capabilities, allowing user to run more demanding applications
  • Advanced stabilization and focusing: The Gimbal and PDAF omnidericional system provide better and more versatile focusing capabilities.

Practical Implications: The Asus is ideal for power users, gamers, and people who frequently use their phones in bright conditions. It also provides a better video experience and better connectivity.

Significant Trade-offs:

  • OnePlus 9 Pro: The older chipset is a significant disadvantage compared to the Asus, and the battery life is not as good.
  • Asus Zenfone 11 Ultra: The larger size and weight might be less comfortable for some users and it has lower PPI.

3. User Profiles & Recommendations

OnePlus 9 Pro Ideal Users:

  • Users who prefer a lightweight phone.
  • Users who prioritize display sharpness and detail.
  • Users who want fast wireless charging.
  • Casual photographers
  • Users who value immersive audio experience.

Specific Use Cases:

  • Social media browsing, content consumption, artistic photography, podcasts, e-books, and other activities where long holding times might occur.

Asus Zenfone 11 Ultra Ideal Users:

  • Gamers: The powerful chipset and high refresh rate make it ideal for gaming.
  • Power Users: Those who demand the best performance and battery life.
  • Outdoor users: The screen brightness is excellent for sunny conditions.
  • Users who want the latest features: Newer software, Wi-Fi and Bluetooth standards.
  • Users who prioritize taking photos zoomed-in.
  • Users who prioritize video quality

Specific Use Cases:

  • Mobile gaming, video editing, GPS Navigation, outdoor photography/videography, streaming movies on the go, and heavy multitasking

Price-to-Value Ratio

  • It is important to check the current market prices as the OnePlus 9 Pro is an older model and may be available at a lower price, while the Asus Zenfone 11 Ultra will be more expensive. Depending on the price difference, the Asus might offer a significantly better performance for the added cost.

4. Decision Framework

Key Questions for Buyers:

  1. Performance vs Portability: Do you need top-tier performance for gaming and heavy tasks, or is a lighter, more comfortable phone a higher priority?
  2. Display Quality Priorities: Do you prefer a sharper display with higher resolution, or a brighter AMOLED screen with better contrast?
  3. Battery Life Needs: Do you need the absolute longest battery life for all-day use, or is a full day of use sufficient for you?

Scenario-Based Recommendations:

  • Scenario 1: Mobile Gamer: If your priority is mobile gaming and performance, the Asus Zenfone 11 Ultra is the clear choice.
  • Scenario 2: Casual User on a Budget: If you primarily use your phone for social media, web browsing, and casual photography, and are on a budget the OnePlus 9 Pro may be adequate and more affordable.
  • Scenario 3: Outdoor Photography Enthusiast: If you regularly take photos and videos outdoors in a variety of lighting conditions the Asus Zenfone 11 Ultra would be a better choice due to its superior performance and screen.
  • Scenario 4: All-Day Heavy User: If you're constantly using your phone for work, communication, or multimedia, the Asus Zenfone 11 Ultra with its extended battery life will be more convenient.

My Choice

If I had to choose between these two phones, I would pick the Asus Zenfone 11 Ultra. While the OnePlus 9 Pro has a more comfortable weight and sharper display, the vast performance advantage of the Snapdragon 8 Gen 3 is too significant to ignore. The difference in the Antutu scores (877,600 vs 1,532,000) indicates a major leap in processing power, which translates to a smoother, more responsive user experience in daily use, and especially while gaming or performing demanding tasks.

I also appreciate the larger battery which provides more confidence that I can use the phone for a whole day without needing to charge. The superior AMOLED screen with its higher brightness will be more practical in real-world scenarios. While I may have to deal with a slightly larger phone, the benefits of performance, battery life and a modern experience with the most recent software make the Asus Zenfone 11 Ultra a more compelling choice for a daily driver, despite the fact that the OnePlus 9 Pro may be available at a better price.

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
  • Digital media communication
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Bridging technical complexity with engaging, accessible narratives.