So i just traded my Fitbit sense for a Garmin Fenix 7 solar sapphire.
Bit my experience so far is that while Fitbit sense counts my steps while mowing the lawn, Garmin doesn't. And while Fitbit tells me to move 250 steps each hour, gamin tells me one time in the morning.
Furthermore, my experience is that Fitbits sleep tracking is whey more accurate and also counts the small naps you light take during the day.. is it just me that haven't set my garmin up good enough or is Fitbit more accurate then Garmin on these parameters.