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Samsung Galaxy S24 Ultra vs Xiaomi 15

The Xiaomi 15 comes out ahead on 9 counts and the Samsung Galaxy S24 Ultra on 3.

Which should you buy?

Pick the Samsung Galaxy S24 Ultra for

  • Bigger screen: 6.8" vs 6.36"
  • Higher-resolution main camera: 200 MP vs 50 MP
  • Optical zoom (5×), which the other lacks

Pick the Xiaomi 15 for

  • Bigger battery: 5,240 vs 5,000 mAh (5% more)
  • Faster wired charging: 90 W vs 45 W
  • Faster wireless charging: 50 W vs 15 W
  • Lighter: 191 g vs 233 g (42 g less)
  • Thinner: 8.1 mm vs 8.6 mm
  • More compact: 10 mm shorter
  • Brighter display: 3,200 vs 2,600 nits peak
  • More RAM: up to 16 GB vs 12 GB
  • Newer: launched October 2024

Size comparison

The Samsung Galaxy S24 Ultra is 10 mm taller, 7.8 mm wider, 0.5 mm thicker and 42 g heavier than the Xiaomi 15. Its screen is 0.44" larger.

  • Samsung Galaxy S24 Ultra162.3 × 79 × 8.6 mm
  • Xiaomi 15152.3 × 71.2 × 8.08 mm

Specs side by side

LaunchSamsung Galaxy S24 UltraXiaomi 15
AnnouncedJanuary 17, 20241October 29, 20241
ReleasedJanuary 31, 20241October 29, 20241
BodySamsung Galaxy S24 UltraXiaomi 15
Size162.3 × 79 × 8.6 mm152.3 × 71.2 × 8.1 mm
Thickness8.6 mm8.1 mm (better)
Weight233 g191 g? (better)
Frame—aviation-grade aluminum1
Water resistanceIP68IP68
ColoursTitanium Black, Titanium Grey, Titanium Violet, Titanium Yellow, Titanium Blue, Titanium Green, Titanium Orange1Liquid Silver, White, Black, Green
DisplaySamsung Galaxy S24 UltraXiaomi 15
Size6.8"6.36"
TypeDynamic AMOLED 2XCrystalRes AMOLED
Resolution1440 × 3120 (better)1200 × 2670
Refresh rate120 Hz120 Hz
Peak brightness2,600 nits3,200 nits (better)
ProtectionCorning Gorilla Glass Armor1—
Performance and softwareSamsung Galaxy S24 UltraXiaomi 15
ChipsetQualcomm Snapdragon 8 Gen 3Snapdragon 8 Elite Mobile Platform
CPUOcta-core (1x3.3 GHz Cortex-X4 & 5x3.2 GHz Cortex-A720 & 2x2.3 GHz Cortex-A520)2 x Prime Core up to 4.32GHz, 6 x Performance Core up to 3.53GHz
Process4 nm3 nm (better)
Ships withAndroid 14 (One UI 6.1)Xiaomi HyperOS 2
OS updates7 years (to Jan 2031)1—
Security updates7 years (to Jan 2031)1—
MemorySamsung Galaxy S24 UltraXiaomi 15
RAM12 GB8 GB / 12 GB / 16 GB (better)
Storage256 GB / 512 GB / 1 TB256 GB / 512 GB / 1 TB
CamerasSamsung Galaxy S24 UltraXiaomi 15
Rear200 MP Main, OIS 50 MP Periscope telephoto (5× optical), OIS 10 MP Telephoto (3× optical), OIS 12 MP Ultrawide50 MP Main 50 MP Telephoto 50 MP Ultrawide
Main camera200 MP (better)50 MP
Optical zoom5× (better)None
Front12 MP32 MP
Video8K@24/30fps18K (7680x4320) at 24/30fps
BatterySamsung Galaxy S24 UltraXiaomi 15
Capacity5,000 mAh5,240 mAh (better)
Wired charging45 W190 W (better)
Wireless charging15 W150 W (better)
Reverse wirelessYes1—
ConnectivitySamsung Galaxy S24 UltraXiaomi 15
5GYesYes1
Wi-FiWi-Fi 71Wi-Fi 7
Bluetooth5.36.0
NFCYes1Yes
USBUSB-C 3.2 (5Gbps)USB Type-C
Headphone jackNo1—
eSIMYesYes
FeaturesSamsung Galaxy S24 UltraXiaomi 15
FingerprintUltrasonic under-display1Ultrasonic in-screen
Stereo speakersYesYes
StylusYes1—

Highlighted: the better value where one is clearly better. Sources for each phone are listed on the Samsung Galaxy S24 Ultra and Xiaomi 15 pages.

Quick answers

Is the Samsung Galaxy S24 Ultra bigger than the Xiaomi 15?
The Samsung Galaxy S24 Ultra is 10 mm taller, 7.8 mm wider, 0.5 mm thicker and 42 g heavier than the Xiaomi 15. Its screen is 0.44" larger.
Which has the bigger battery, the Samsung Galaxy S24 Ultra or the Xiaomi 15?
The Xiaomi 15 has the bigger battery: 5,240 mAh against 5,000 mAh. Real battery life also depends on the chip and screen.

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