ASUS Zenfone 12 Ultra vs Samsung Galaxy S25 Ultra
Overall: ASUS Zenfone 12 Ultra. Their chips, the 8 Elite (flagship) and the 8 Elite for Galaxy (flagship), are close in speed. The Zenfone 12 Ultra has the bigger battery (5,500 mAh against 5,000 mAh). The Zenfone 12 Ultra has faster wired charging (65 W against 45 W). The Galaxy S25 Ultra has the longer update promise (until about 2032 against until about 2027).
ASUS
Zenfone 12 Ultra
Snapdragon 8 Elite
Samsung
Galaxy S25 Ultra
Snapdragon 8 Elite for GalaxyWhat matters to you?
Tap what you use your phone for. The overall pick then counts only those.
Overall: ASUS Zenfone 12 Ultra
Better for everyday life. Score: Zenfone 12 Ultra 1, Galaxy S25 Ultra 0 (clear win 2, slight edge 1, same 0).
Backed by facts100% of areas
Pick this for…
Who wins for each way you use a phone. Tap a card for the evidence.
Social media
Chats, calls, lives and feeds
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Social media
Chats, calls, lives and feeds
- Everyday speed: 8 Elite 5 of 5, 8 Elite for Galaxy 5 of 5.
- Memory: 12 GB against 12 GB, so more apps stay open when you switch between chats and feeds.
- Front camera video for calls and lives: 1080p@30fps against 4K@60fps.
Gaming
Light games to heavy 3D, online and offline
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Gaming
Light games to heavy 3D, online and offline
- Gaming power: 8 Elite 5 of 5, 8 Elite for Galaxy 5 of 5.
- Graphics: Adreno 830 (3 nm) against Adreno 830 (3 nm).
- Screen: 120 Hz against 120 Hz.
- Light games run well on both. The gap shows in heavy 3D games. How long a phone holds its speed when hot needs testing, so it is not judged.
Camera and content creation
Photos, video recording and editing
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Camera and content creation
Photos, video recording and editing
- Video recording: 8K@24fps against 8K@30fps.
- Front camera video: 1080p@30fps against 4K@60fps.
- Editing and export: 8 Elite 5 of 5, 8 Elite for Galaxy 5 of 5. Storage: not listed for either phone.
- Photo and video quality need side-by-side testing, so we do not judge them from megapixels.
Work, study and AI
Learning, research, writing and AI assistants
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Work, study and AI
Learning, research, writing and AI assistants
- Heavy work: 8 Elite 5 of 5, 8 Elite for Galaxy 5 of 5.
- Memory: 12 GB against 12 GB. On-phone AI features need plenty of memory; most AI assistants run online and work on any phone.
- Screen: 6.78″ AMOLED against 6.9″ LTPO AMOLED.
Movies, music and streaming
YouTube, Netflix, sport, music and podcasts
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Movies, music and streaming
YouTube, Netflix, sport, music and podcasts
- Screen: 6.78″ AMOLED against 6.9″ LTPO AMOLED.
- AV1 video decoding (smoother YouTube and Netflix, less battery): yes against yes.
- Sound: stereo speakers, against stereo speakers.
Everyday life
Maps, ride-hailing, payments and banking
Slight edgePick Zenfone 12 UltraOfficialPublic infoWhy? See the evidenceHide the evidence
Everyday life
Maps, ride-hailing, payments and banking
- Tap to pay (NFC): yes against yes.
- Location: dual-band GPS (L1 + L5) against single-band GPS. Dual-band GPS stays accurate between tall buildings.
Phone basics
What every use depends on, side by side.
Battery life
Zenfone 12 Ultra5,500 mAh65 W charging
Galaxy S25 Ultra5,000 mAh45 W charging
Efficiency: 8 Elite 5 of 5, 8 Elite for Galaxy 5 of 5
Storage
Zenfone 12 Ultra256 GB / 512 GBType not published
Galaxy S25 Ultra256 GB / 512 GB / 1 TBType not published
UFS opens apps and files far faster than eMMC
Speed
Zenfone 12 Ultra8 Elite12 GB / 16 GB RAM
Galaxy S25 Ultra8 Elite for Galaxy12 GB / 16 GB RAM
Everyday speed: 5 of 5 against 5 of 5
Screen
Zenfone 12 Ultra6.78″ AMOLED120 Hz
Galaxy S25 Ultra6.9″ LTPO AMOLED120 Hz
Bigger is not better; pick the size you like
Toughness
Zenfone 12 UltraIP68
Galaxy S25 UltraIP68
IP68 survives dust and a dunk in water
Years of updates
Zenfone 12 UltraUntil about 20272 Android upgrades, 2 years of security updates
Galaxy S25 UltraUntil about 20327 Android upgrades, 7 years of security updates
From the maker’s written update promise
Side by side
Show differences only
| Spec | Zenfone 12 Ultra | Galaxy S25 Ultra |
|---|---|---|
| Size | 6.78″ | 6.9″ |
| Type | AMOLED | LTPO AMOLED |
| Resolution | 2400 × 1080 | 1440 × 3120 |
| Refresh rate | 120 Hz | 120 Hz |
| Peak brightness | 2500 nits | 2600 nits |
| Spec | Zenfone 12 Ultra | Galaxy S25 Ultra |
|---|---|---|
| Chipset | Snapdragon 8 Elite | Snapdragon 8 Elite for Galaxy |
| RAM | 12 GB / 16 GB | 12 GB / 16 GB |
| Storage | 256 GB / 512 GB | 256 GB / 512 GB / 1 TB |
| Storage type | — | — |
| Spec | Zenfone 12 Ultra | Galaxy S25 Ultra |
|---|---|---|
| Main camera | 50 MP | 200 MP |
| Zoom | 3x optical | 5x optical |
| Video recording | 8K@24fps | 8K@30fps |
| Front camera | 32 MP | 12 MP |
| Front video | 1080p@30fps | 4K@60fps |
| Spec | Zenfone 12 Ultra | Galaxy S25 Ultra |
|---|---|---|
| Capacity | 5500 mAh | 5000 mAh |
| Wired charging | 65 W | 45 W |
| Wireless charging | 15 W | 15 W |
| Spec | Zenfone 12 Ultra | Galaxy S25 Ultra |
|---|---|---|
| Stereo speakers | Yes | Yes |
| Headphone jack | — | — |
| NFC (tap to pay) | Yes | Yes |
| Dual-band GPS | Yes | No |
| 5G | Yes | Yes |
| eSIM | Yes | Yes |
| Spec | Zenfone 12 Ultra | Galaxy S25 Ultra |
|---|---|---|
| Weight | 220 g | 218 g |
| Thickness | 8.9 mm | 8.2 mm |
| Water resistance | IP68 | IP68 |
| Spec | Zenfone 12 Ultra | Galaxy S25 Ultra |
|---|---|---|
| At launch | Android 15 | Android 15 |
| OS upgrades | 2 years | 7 years |
| Security updates | Not stated | Not stated |
Quick answers
- Is the Zenfone 12 Ultra or the Galaxy S25 Ultra better for social media?
- For social media, there’s no real difference between them. Everyday speed: 8 Elite 5 of 5, 8 Elite for Galaxy 5 of 5.
- Is the Zenfone 12 Ultra or the Galaxy S25 Ultra better for gaming?
- For gaming, there’s no real difference between them. Gaming power: 8 Elite 5 of 5, 8 Elite for Galaxy 5 of 5.
- Is the Zenfone 12 Ultra or the Galaxy S25 Ultra better for camera and content creation?
- For camera and content creation, there’s no real difference between them. Video recording: 8K@24fps against 8K@30fps.
- Is the Zenfone 12 Ultra or the Galaxy S25 Ultra better for work, study and ai?
- For work, study and ai, there’s no real difference between them. Heavy work: 8 Elite 5 of 5, 8 Elite for Galaxy 5 of 5.
- Is the Zenfone 12 Ultra or the Galaxy S25 Ultra better for movies, music and streaming?
- For movies, music and streaming, there’s no real difference between them. Screen: 6.78″ AMOLED against 6.9″ LTPO AMOLED.
- Is the Zenfone 12 Ultra or the Galaxy S25 Ultra better for everyday life?
- The Zenfone 12 Ultra has a slight edge for everyday life. Tap to pay (NFC): yes against yes.
What we don’t judge on
Security patch level, charging watts, megapixels, benchmark scores and guessed values.
- Security patch level and other software settings change with every update, so one reading can’t judge a phone. We use the maker’s written update promise.
- Charging watts, megapixels, screen size and weight are shown, never scored as better: faster charging doesn’t make a battery last longer, and more megapixels don’t make better photos.
- Chip estimates (1 to 5) come from published design facts: core design and year, graphics, manufacturing and video features. Photo quality and how long a phone holds its speed when hot need testing, so they aren’t judged.
- Values with no source show “not published” and stay out of the verdict.
ASUS Zenfone 12 Ultra specsSamsung Galaxy S25 Ultra specsCompare with another phone