PhoneLifespan

ROG Phone 8 vs ROG Phone 9

vs

Winner

Asus ROG Phone 9

Lifespan decides this one: the ROG Phone 9 is supported until Nov 2029 at $24.35 per month of safe use, while the ROG Phone 8 runs out in Jan 2029 ($27.42/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: ROG Phone 8 60 · ROG Phone 9 58 — methodology

The lifespan decider

When specs are close, support length decides it — this is what each phone costs per month of safe use.

Asus ROG Phone 8 $850
Buy with care$27.42/mo
2024◆ Buy-by Jan 20272029
Asus ROG Phone 9 $999
Safe to buy$24.35/mo
2024◆ Buy-by Nov 20272029

Category by category

Display
ROG Phone 8 80ROG Phone 9 60

The ROG Phone 8's screen is the better one — 6.78-inch ltpo amoled, 1080x2400, 165hz.

Performance
ROG Phone 8 92ROG Phone 9 98

The ROG Phone 9's Qualcomm Snapdragon 8 Elite is simply the faster chip.

Camera
ROG Phone 8 79ROG Phone 9 67

The ROG Phone 8 has the stronger camera system (3 real rear lenses vs 2).

Battery
ROG Phone 8 90ROG Phone 9 96

5,800mAh vs 5,500mAh — the ROG Phone 9 lasts longer between charges.

Software longevity
ROG Phone 8 37ROG Phone 9 49

The ROG Phone 9 is supported until Nov 2029 — 10 months longer than the ROG Phone 8.

Value
ROG Phone 8 60ROG Phone 9 58

Pound for pound, these two are equally good deals.

Full spec table
SpecROG Phone 8ROG Phone 9
Price (street)$850$999
Display6.78-inch LTPO AMOLED, 1080x2400, 165Hz6.78-inch LTPO AMOLED, 1080x2400, 185Hz
ChipsetQualcomm Snapdragon 8 Gen 3Qualcomm Snapdragon 8 Elite
RAM12GB/16GB12GB/16GB
Storage256GB/512GB256GB/512GB
Battery5,500 mAh5,800 mAh
Charging65W wired, 15W wireless65W wired, 15W wireless
Rear cameras50MP main, 13MP ultra-wide, 32MP telephoto 3x50MP main, 13MP ultra-wide, 5MP macro
Dimensions163.8 × 76.8 × 8.9 mm163.8 × 76.8 × 8.9 mm
Weight225 g227 g
Water resistanceIP68IP68
Supported untilJan 2029Nov 2029
ROG Phone 8 full verdict →ROG Phone 9 full verdict →Longevity master board →

Scores and verdicts are computed from our verified database — see exactly how. Specs from manufacturer documentation; prices reflect major US retailers.