What matters

This is not a performance-class mismatch: both are 6.9-inch, 120Hz, IP68 Android flagships in the Snapdragon 8 Elite Gen 5 class. The meaningful choice is therefore between Xiaomi's emphasis on camera hardware and charging, and Samsung's broader work, privacy, and long-ownership toolkit.

Key differences

  • Camera hardware: Xiaomi pairs a 50MP 1-inch main camera with an f/1.67 aperture and a 200MP mechanical telephoto spanning 75mm to 100mm. Samsung instead uses a 200MP main, 50MP ultrawide, 50MP telephoto, and 10MP telephoto with 3x and 5x optical zoom. Xiaomi consequently gives photographers a larger main sensor and adjustable telephoto framing before digital processing, while Samsung provides a fixed multi-camera ladder. Favor Xiaomi when optical capture flexibility drives the purchase, but treat real scene results as a test question rather than a spec-sheet verdict.
  • Battery and charging: the India-listed Xiaomi configuration combines a 6000mAh battery with 90W wired and 50W wireless charging, compared with a 5000mAh battery and 60W wired charging for the cited UK Samsung model. More rated capacity and higher accepted charging power can reduce time near a charger for heavy users, provided the regional model, adapter, temperature, and battery state support the listed rates.
  • Work and ownership: Samsung combines a built-in S Pen, DeX, Privacy Display, a 214g body, and a stated seven years of security updates. That package supports handwritten annotation, desktop-style work, more discreet viewing in shared spaces, and a longer planned ownership window. Buyers who use those workflows may reasonably prefer Samsung even though Xiaomi has the more aggressive charging hardware.

Who it is for

  • Pick the Xiaomi 17 Ultra if still photography, telephoto composition, and quick top-ups are daily priorities, and you expect to use its larger main sensor and mechanical zoom range rather than merely admire the specifications.
  • Pick the Samsung Galaxy S26 Ultra if you will write with the S Pen, connect through DeX, use Privacy Display in public, or keep the phone long enough for its stated security-support horizon to matter. Its four-camera layout still gives you broad focal coverage without making it the universal camera choice.
  • Buy neither Ultra if advanced camera controls, S Pen, DeX, privacy features, and premium long-term support are not part of your routine. A less expensive flagship can cover ordinary apps, messaging, and casual photography without charging you for specialist hardware you will rarely use.

Watch-outs

  • There is no universal camera winner here. Sensor size and focal coverage describe available hardware, but processing, firmware, scene, mode, and focal length can change the result. Compare matched photo and video samples for the situations you actually shoot.
  • Check both phones on the same local basis before paying: match storage, street price, network support, services, warranty, and box contents. The cited Xiaomi and Samsung configurations come from different markets, and regional differences can reverse the better-value choice.
  • Maximum charging rates require compatible hardware and favorable conditions. Include a suitable adapter, case, and any optional photography kit in the ownership cost rather than comparing phone prices alone.