@DRezvoff The image you posted is from Strava. Strava will change the elevation data for non barometric devices as well, so comparing from Strava is probably not the best. From the links you sent only the Suunto 9 (non baro) and Spartan Sport do not have barometers assuming the one marked Garmin also has a barometer. The two without barometer show the greater deviation. However, your watch is showing poor readings, worse than I would expect.