Key takeaways
According to the tester, the Amazfit Cheetah 2 Ultra stands out for a more refined build, a very bright screen and navigation deemed highly precise for trail running. The advertised battery life is backed up by its tests, to the point of significantly reducing the mental load associated with the battery. The main caveat concerns a small possible lag when restarting a split during intervals.
7RUN did not carry out this test. This summary rephrases iRunFar's results and the specifications published by the manufacturer. See the source for the full protocol and the tester's context.