Smartphones comparison

Samsung Galaxy S25 128GB vs Samsung Galaxy S25 Ultra 256GB

Compare every shared field with exact values, visual meters and a clear winner for each measurable specification.

Samsung Galaxy S25 Ultra 256GB

Samsung Galaxy S25 Ultra 256GB leads the measurable fields

It wins 4 fields to 2, with 2 ties. This count covers listed numeric fields—not total product quality.

2Samsung winsTO4Samsung wins2ties

SmartphonesProduct A

Samsung

Samsung Galaxy S25 128GB

Pocket decisions

Display: 6.2 in
Weight: 162 g
Thickness: 7.2 mm
Storage: 128 GB

Buy now at Amazon

SmartphonesProduct B

Samsung

Samsung Galaxy S25 Ultra 256GB

Pocket decisions

Display: 6.9 in
Weight: 218 g
Thickness: 8.2 mm
Storage: 256 GB

Buy now at Amazon

At a glance

Four differences most likely to change the choice.

Each card names the product with the measurable advantage and the size of the gap.

Higher camera resolution

Samsung Galaxy S25 Ultra 256GB

Samsung Galaxy S25 Ultra 256GB wins camera resolution by 300%.

More storage

Samsung Galaxy S25 Ultra 256GB

Samsung Galaxy S25 Ultra 256GB wins storage by 100%.

Lighter body

Samsung Galaxy S25 128GB

Samsung Galaxy S25 128GB wins weight by 26%.

Larger battery capacity

Samsung Galaxy S25 Ultra 256GB

Samsung Galaxy S25 Ultra 256GB wins battery capacity by 25%.

Field comparison

Read every measurable field as a meter.

Longer means stronger only for the stated direction. Exact values remain beside every bar.

Display size

A larger diagonal provides more screen area, while a smaller phone can be easier to handle.

Higher wins

Samsung Galaxy S25 128GB

6.2 in

Samsung Galaxy S25 Ultra 256GB

6.9 in

Field winner More screen spaceSamsung Galaxy S25 Ultra 256GB

Weight

Lower listed weight can improve portability and one-handed comfort.

Lower wins

Samsung Galaxy S25 128GB

162 g

Samsung Galaxy S25 Ultra 256GB

218 g

Field winner Lighter bodySamsung Galaxy S25 128GB

Thickness

A thinner body can be easier to carry, though it does not prove durability.

Lower wins

Samsung Galaxy S25 128GB

7.2 mm

Samsung Galaxy S25 Ultra 256GB

8.2 mm

Field winner Thinner bodySamsung Galaxy S25 128GB

Base storage

More listed storage leaves additional room for apps, photos and video.

Higher wins

Samsung Galaxy S25 128GB

128 GB

Samsung Galaxy S25 Ultra 256GB

256 GB

Field winner More storageSamsung Galaxy S25 Ultra 256GB

Display refresh rate

A higher maximum refresh rate can make supported motion look smoother.

Higher wins

Samsung Galaxy S25 128GB

120 Hz

Samsung Galaxy S25 Ultra 256GB

120 Hz

Field winner TieTie

Main camera resolution

Megapixels describe output resolution, not complete camera quality.

Higher wins

Samsung Galaxy S25 128GB

50 MP

Samsung Galaxy S25 Ultra 256GB

200 MP

Field winner Higher camera resolutionSamsung Galaxy S25 Ultra 256GB

Peak display brightness

Higher peak brightness can improve visibility and HDR highlights under supported conditions.

Higher wins

Samsung Galaxy S25 128GB

2,600 nits

Samsung Galaxy S25 Ultra 256GB

2,600 nits

Field winner TieTie

Listed battery capacity

Capacity is one input to endurance; software, display and radio use also matter.

Higher wins

Samsung Galaxy S25 128GB

4,000 mAh

Samsung Galaxy S25 Ultra 256GB

5,000 mAh

Field winner Larger battery capacitySamsung Galaxy S25 Ultra 256GB

Your Fit Meter

Make the decision personal.

Move the sliders to show how much each field matters to you. The result changes instantly and stays separate from the factual field winners.

Samsung Galaxy S25 128GB50/100

Samsung Galaxy S25 Ultra 256GB50/100

Adjust the sliders to calculate your fit.

Display6/10

A larger diagonal provides more screen area, while a smaller phone can be easier to handle.

Weight6/10

Lower listed weight can improve portability and one-handed comfort.

Thickness6/10

A thinner body can be easier to carry, though it does not prove durability.

Storage4/10

More listed storage leaves additional room for apps, photos and video.

Refresh rate4/10

A higher maximum refresh rate can make supported motion look smoother.

Full field comparison

Every available field, value and winner.

10 of 10 fields have values for both products. Descriptive fields are shown without inventing a winner.

Specification	Samsung Galaxy S25 128GB	Samsung Galaxy S25 Ultra 256GB	Field winner
Display & design
Display sizeA larger diagonal provides more screen area, while a smaller phone can be easier to handle.	6.2 in	6.9 inWinner	More screen space Samsung Galaxy S25 Ultra 256GB has the higher listed value.
WeightLower listed weight can improve portability and one-handed comfort.	162 gWinner	218 g	Lighter body Samsung Galaxy S25 128GB has the lower listed value.
ThicknessA thinner body can be easier to carry, though it does not prove durability.	7.2 mmWinner	8.2 mm	Thinner body Samsung Galaxy S25 128GB has the lower listed value.
Display refresh rateA higher maximum refresh rate can make supported motion look smoother.	120 Hz	120 Hz	Tie Both products list the same value.
Peak display brightnessHigher peak brightness can improve visibility and HDR highlights under supported conditions.	2,600 nits	2,600 nits	Tie Both products list the same value.
Memory & storage
Base storageMore listed storage leaves additional room for apps, photos and video.	128 GB	256 GBWinner	More storage Samsung Galaxy S25 Ultra 256GB has the higher listed value.
Camera
Main camera resolutionMegapixels describe output resolution, not complete camera quality.	50 MP	200 MPWinner	Higher camera resolution Samsung Galaxy S25 Ultra 256GB has the higher listed value.
Power
Listed battery capacityCapacity is one input to endurance; software, display and radio use also matter.	4,000 mAh	5,000 mAhWinner	Larger battery capacity Samsung Galaxy S25 Ultra 256GB has the higher listed value.
Protection
Water and dust ratingRatings apply only under the conditions stated for the exact model.	IP68	IP68	Tie Both products list the same value.
Performance
ProcessorProcessor names identify the platform but do not replace application-specific testing.	Snapdragon 8 Elite for Galaxy	Snapdragon 8 Elite for Galaxy	Tie Both products list the same value.

Decision summary

Choose the strengths that fit your life.

Choose product A when…

Samsung Galaxy S25 128GB

Its strongest measurable advantages in this head-to-head are:

Weight: 162 g
Thickness: 7.2 mm

Buy now at Amazon

Choose product B when…

Samsung Galaxy S25 Ultra 256GB

Its strongest measurable advantages in this head-to-head are:

Display: 6.9 in
Storage: 256 GB
Camera resolution: 200 MP
Battery capacity: 5,000 mAh

Buy now at Amazon

Field wins compare listed numbers only. They do not prove overall quality, durability, comfort, camera output or real-world performance. Product configurations and availability can vary; confirm the exact Amazon listing before purchase.

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