@Thaler-Martin I come from Garmin, and Amazfit too. At the moment, my Race 2 is on par with Amazfit considering sleep tracking, but slightly more in line with my feelings. Clearly, Suunto is better, for me, at tracking sleep time and HR. HRV is quite equal. The worst is Garmin for me, considering sleep time accuracy and sleep score. HRV interpretation is also worse on Garmin (it takes too much time to adapt to new baseline fluctuation caused by seasons and training load, giving wrong alert in HRV status).
Btw, I’m quite new with the Race 2, and have 2 nights to go before receiving HRV status.