Are the Cheetah 2 Pro and Cheetah 2 Ultra features the same?

Yes, per Amazfit’s own published specifications. The advanced running support, peripheral support, third-party app sync, sleep tracking, health features, BioCharge readiness score, Zepp Pay contactless payments, and Zepp Flow voice control are identical word-for-word. The sensor (BioTracker 6.0) and the satellite positioning chipset (dual-band, six-constellation, with a circularly polarised antenna) are the same. The Ultra adds three trail-specific software items, Trail Running mode with load factor, full-colour contour maps, and a colour-coded elevation overview, plus larger hardware.

Is the Cheetah 2 Ultra worth £150 more than the Cheetah 2 Pro?

For trail and ultra runners who need a 33-hour GPS, offline topographic maps, and the elevation overview tool, yes. For road runners and marathon trainees, no. The Pro offers the same training workflow, metrics, and ecosystem integrations. The £150 premium buys hardware that does trail-specific work, not the capabilities the Pro lacks for road use.

Will the Cheetah 2 Pro get the Ultra's Trail Running mode via a firmware update?

Unknown. Trail Running mode with load factor, the full-colour contour maps, and the faster map rendering claimed by Amazfit may be CPU-gated to the HS3s chip in the Ultra. They may instead be a commercial choice. Amazfit has not said either way.