Device summary

Samsung

Galaxy S25 Ultra

vivo

X300 Ultra

Full specifications

Full specifications
Basic information
Release year20252026
Starting price$1,300
Display size6.9-inch6.8-inch
Dimensions77.6 mm × 162.8 mm × 8.2 mm76.8 mm × 163.0 mm × 8.2 mm
Weight218 g232 g
Front materialCorning Gorilla Armor 2
Back material
Display
Display technologyDynamic AMOLED 2X
Refresh rate120 Hz
ProtectionCorning Gorilla Armor 2
Resolution3168 × 1440
Performance
ChipsetSnapdragon 8 Elite for GalaxySnapdragon 8 Elite Gen 5
RAM12 GB16 GB
Storage256 GB, 512 GB, 1024 GB512 GB
Expandable storageNo
Cameras
Main cameraWide · 200 MP · ƒ/1.7 · OISMain · 200 MP · ƒ/1.85 · OIS
Ultra-wide cameraUltra Wide · 50 MP · ƒ/1.9Ultra Wide · 50 MP · ƒ/2.0
Telephoto cameraTelephoto · 10 MP · ƒ/2.4 · 3x Optical Zoom · OISTelephoto · 200 MP · ƒ/2.67 · OIS
Rear camera 4Telephoto · 50 MP · ƒ/3.4 · 5x Optical Zoom · OIS
Front camerasFront · 12 MP · ƒ/2.2Front · 50 MP · ƒ/2.45
Battery & charging
Wired charging45 W100 W
Charging standardFast Wireless Charging 2.0, Wireless PowerShare
Typical capacity5000 mAh6600 mAh
Rated capacity4855 mAh6395 mAh
Connectivity
Cellular5G, LTE5G, LTE
Wi‑FiWi‑Fi 7Wi‑Fi 6E
BluetoothBluetooth 5.4Bluetooth 6.0
USBUSB‑CUSB 3.2
NFCYes
eSIMYes
Build & durability
FrameTitanium
Ingress protectionIP68

Key differences

The most meaningful measured gaps in size and weight — not an overall winner.

  • Weight

    Galaxy S25 Ultra

    14 g lighter

  • Width

    Galaxy S25 Ultra

    0.8 mm wider · minor difference

  • Height

    Very similar height

  • Thickness

    Very similar thickness

Galaxy S25 Ultra vs X300 Ultra Size Comparison

User Experience Summary

Galaxy S25 Ultra

Strengths

  • Gorilla Armor anti-reflective display for outdoor clarity
  • Versatile cameras with 5x periscope and 200MP main
  • S Pen productivity and titanium durability

Compromises

  • Heavy, wide chassis limits one-handed and pocket comfort
  • 45W charging not class-leading
  • Fingerprint sensor occasionally inconsistent

X300 Ultra

Strengths

  • Class-leading Zeiss imaging with 200 MP main and periscope telephoto
  • Sharp 6.82-inch QHD+ AMOLED with adaptive 144 Hz
  • Elite Gen 5 speed with 100 W wired and 40 W wireless charging

Compromises

  • Heavy 232 g phablet ergonomics versus X300 FE and standard flagships
  • OriginOS 6 promotional surfaces at Ultra pricing
  • Thermal warmth during sustained 4K video and gaming

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