X300 Ultra vs 17 Ultra
Winner
Vivo X300 Ultra
The X300 Ultra wins this one, taking software longevity decisively. Against the 17 Ultra it's also the sounder buy at $20.39 per month of safe use.
Value Score: X300 Ultra 73 · 17 Ultra 68 — methodology
Who should pick which
Beyond the scores — our take on each phone and the buyer it actually suits.
The X300 Ultra's dual 200MP camera system and semi-solid-state battery make it Vivo's most ambitious phone yet, but it only just went on sale globally, so its full multi-year support window is still ahead of it.
Pick it if
- ✓ zoom-obsessed photographers
- ✓ buyers who want the newest flagship camera hardware
Skip it if
- ✗ you need US warranty coverage
- ✗ you want a slim, light phone
Xiaomi's camera flagship pairs a 1-inch main sensor with a 200MP APO periscope and finally reaches the global market at MWC 2026, backed by security patches through February 2032.
Pick it if
- ✓ Mobile photographers who want the best zoom range on the market
- ✓ Buyers who want Xiaomi's flagship camera with the longest remaining support window
Skip it if
- ✗ You want the largest possible battery (the China variant is bigger)
- ✗ You need an official US retailer and warranty
The lifespan decider
When specs are close, support length decides it — this is what each phone costs per month of safe use.
Category by category
Both displays are effectively the same class.
Performance is a wash — same chip tier.
Camera systems are comparable on paper — pick by sample photos.
Battery capacities are close enough not to decide this.
The X300 Ultra is supported until Apr 2033 — 14 months longer than the 17 Ultra.
Overall value goes to the X300 Ultra at $20.39 per month of safe use.
Frequently asked
How long will the Vivo X300 Ultra be supported?
Vivo hasn't published a separate written policy specific to the X300 Ultra at the time of writing, but based on the X300 and X300 Pro's official 5-year OS/7-year security commitment, buyers can reasonably expect the same, projecting support into around 2033.
Is the X300 Ultra sold in the US?
No. It launched in China in March 2026 and expanded to Europe, India, and parts of Asia and the Middle East by May 2026, but Vivo has not brought it to the US market, so any US unit is an import without official warranty.
Did the Xiaomi 17 Ultra actually launch, or is it still a rumor?
It's real and on sale: Xiaomi unveiled it globally on February 28, 2026 at MWC in Barcelona, and it has been shipping and reviewed since, with retail listings live as of mid-2026.
How long will the Xiaomi 17 Ultra be supported?
Xiaomi's 4-year OS / 6-year security update commitment for the 17 series puts end-of-support around February 2032, so a mid-2026 purchase still banks roughly 5.5 years of patches.
Full spec table
| Spec | X300 Ultra | 17 Ultra |
|---|---|---|
| Price (street) | $1650 | $1650 |
| Display | 6.82-inch LTPO AMOLED, 120Hz, up to 4500 nits peak brightness | 6.9-inch LTPO AMOLED, 2K, 120Hz, up to 3500 nits peak |
| Chipset | Qualcomm Snapdragon 8 Elite Gen 5 | Qualcomm Snapdragon 8 Elite Gen 5 |
| RAM | 16GB | 12GB/16GB |
| Storage | 512GB/1TB | 256GB/512GB/1TB |
| Battery | 6,600 mAh | 6,000 mAh |
| Charging | 100W wired, 40W wireless | 90W wired, 50W wireless |
| Rear cameras | 200MP main, 200MP periscope 3.7x, 50MP ultra-wide | 50MP main, 200MP periscope 3.2-4.3x, 50MP ultra-wide |
| Dimensions | 163.0 x 76.8 x 8.2-8.5 mm | 162.9 x 77.6 x 8.29 mm |
| Weight | 232 g | 218 g |
| Water resistance | IP68/IP69 | IP68 |
| Supported until | Apr 2033 | Feb 2032 |
More comparisons
Scores and verdicts are computed from our verified database — see exactly how. Specs from manufacturer documentation; prices reflect major US retailers.