ASUS Zenfone 12 Ultra vs Samsung Galaxy S25+

ASUS Zenfone 12 Ultra

ASUS

Good

Samsung Galaxy S25+

Samsung

8.3

Great

What Reviewers Agree On

Snapdragon 8 Elite delivers excellent, blazing-fast performance
Battery life is genuinely strong — comfortably lasts a full day and beyond
6-axis gimbal stabilizer produces uniquely impressive video stabilization
Clean near-stock Android with minimal bloatware is the best software package on Android
Only 2 Android updates is universally criticized as unacceptable at EUR 1,099
Camera processing falls short of Samsung, Google, and Apple at this price tier

Deal Breakers

Only 2 Android OS updates — worst among 2025 flagships at this price

Detailed Comparison

Design & Build

ASUS Zenfone 12 Ultra

Sleek matte glass back with ultra-narrow bezels and IP68 water resistance. The rare 3.5mm headphone jack is a welcome differentiator. However, the design is nearly identical to the Zenfone 11 Ultra, and the large 6.78-inch form factor disappointed fans of ASUS's formerly compact Zenfone line.

Retains the rare 3.5mm headphone jack — almost unique among 2025 flagships
IP68 water resistance with Gorilla Glass Victus 2 and sleek matte glass back
Nearly identical design to the Zenfone 11 Ultra — barely iterative year-over-year
No charger included in the box despite the premium EUR 1,099 price

Samsung Galaxy S25+

The S25+ features a sleek, refined design with flat edges and Gorilla Glass Victus 2 on both sides. While not dramatically different from the S24+, it's slightly thinner and lighter, earning praise for its premium feel.

The flat-edge design gives it a more modern, premium look compared to previous generations

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Display

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+

The 6.7-inch Dynamic AMOLED 2X display is universally praised as one of the best in the industry, with QHD+ resolution, 120Hz refresh rate, and exceptional brightness for outdoor visibility.

The QHD+ AMOLED display is stunning with vibrant colors and deep blacks — one of the best screens available
Peak brightness of 2,600 nits makes it easily readable even in direct sunlight
120Hz adaptive refresh rate is smooth and responsive for scrolling and gaming

Battery Life

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+

The 4,900mAh battery comfortably lasts a full day for most users, with the Snapdragon 8 Elite's efficiency helping extend endurance. Charging speeds remain adequate but not class-leading.

Battery easily lasts a full day with moderate to heavy use — a noticeable improvement over the S24+
45W wired charging gets you to 65% in 30 minutes, which is competitive but not the fastest
15W wireless charging and reverse wireless charging round out the charging options