ASUS Zenfone 12 Ultra vs Samsung Galaxy S25 Ultra

ASUS Zenfone 12 Ultra

The 6.78-inch Samsung E6 AMOLED panel delivers 2,500 nits peak brightness with LTPO adaptive 1-120Hz (144Hz for gaming). Vivid colors and excellent outdoor readability are let down by FHD+ resolution at a price where competitors offer QHD+, and poor minimum brightness.

• 2,500 nits peak brightness with LTPO 1-120Hz and 144Hz gaming mode — vivid and responsive
• Same display panel as the Zenfone 11 Ultra — no improvement whatsoever year-over-year
• Only FHD+ resolution at EUR 1,099 — competitors offer QHD+ at this price tier

Samsung Galaxy S25 Ultra

The 6.9-inch Dynamic AMOLED 2X display with 2600 nit peak brightness and anti-reflective coating is universally praised as the best smartphone display available.

• 2600 nit peak brightness with anti-reflective coating makes it the most sunlight-readable phone
• 120Hz LTPO refresh rate is butter smooth with excellent touch response

ASUS Zenfone 12 Ultra

Snapdragon 8 Elite delivers class-leading performance — described as "the fastest phone I used in 2025" by Android Central. The clean, near-stock Android 15 experience with no bloatware makes it one of the most fluid Android phones available. On-device Meta Llama 3 AI processing is private but slow.

• "The fastest phone I used in 2025" — Snapdragon 8 Elite with the best-tuned software on Android
• Clean near-stock Android 15 with zero bloatware — extremely fluid and well-optimized
• On-device Meta Llama 3 AI is privacy-friendly but slow — often faster to just do the task manually
• Aggressive thermal throttling under sustained loads — GPU benchmark scores lower than expected

Samsung Galaxy S25 Ultra

Snapdragon 8 Elite delivers the fastest Android performance available with excellent efficiency. 12GB RAM handles multitasking and AI workloads effortlessly.

• Snapdragon 8 Elite is a beast — fastest Android chip with significant efficiency gains
• On-device AI processing is noticeably faster than cloud-based alternatives
• Thermals are well-managed with the larger vapor chamber — no throttling in sustained use

ASUS Zenfone 12 Ultra

The standout is the 6-axis Hybrid Gimbal Stabilizer 4.0 which delivers uniquely impressive video stabilization — a 66% improvement over the predecessor. The 50MP main camera is solid in good light, but HDR processing produces visible ghosting artifacts, dynamic range suffers with crushed shadows and clipped highlights, and the overall camera system doesn't compete at this price tier.

• 6-axis Hybrid Gimbal Stabilizer is uniquely excellent for video — best-in-class stabilization
• HDR processing leaves visible ghosting artifacts in photos — a shocking flaw for a 2025 flagship
• Dynamic range issues: shadows frequently crushed, highlights clipped, colors washed out and cold
• "Better than midrange but not flagship level" — not competitive with Galaxy S25 Ultra or Pixel 9 Pro

Samsung Galaxy S25 Ultra

The quad camera system features an improved 200MP main sensor, 50MP ultrawide, 10MP 3x telephoto, and 50MP 5x periscope. Galaxy AI enhances post-processing significantly.

• 200MP main sensor produces incredibly detailed shots with improved noise handling
• Galaxy AI photo editing (Generative Edit, Best Face) is genuinely useful and well-implemented
• Video recording improvements with LOG support appeal to content creators
• Night mode still trails iPhone 16 Pro in very low light scenarios

ASUS Zenfone 12 Ultra

The 5,500mAh dual-cell battery delivers excellent all-day endurance that approaches two days for lighter users. 65W wired charging goes from 0-77% in 30 minutes, and Qi 1.3 wireless charging is included. Battery specs are unchanged from the Zenfone 11 Ultra.

• 5,500mAh battery delivers excellent all-day endurance — close to two days for light users
• 65W wired charging reaches 77% in 30 minutes with Qi 1.3 wireless charging support
• Same battery specs as Zenfone 11 Ultra — 65W charging falls behind competitors offering 100W+

Samsung Galaxy S25 Ultra

The 5000mAh battery paired with Snapdragon 8 Elite efficiency delivers solid all-day battery life, though charging speeds remain conservative.

• Easily lasts a full day with heavy use, and two days with moderate use
• 45W wired charging is adequate but slow compared to OnePlus and Xiaomi offerings