Versa is allot more accurate. I have a watch 3 for a few days now and it annoys the bliep out of me. My score and sleepdata gets broken up when I wake during the night and go sleep again. I get weird scores because of it and the data is useless. Deep sleep does not get recorderd wel either, 2 to 14 mins max while my versa says its 45 mins to 1.30 mins. Of course this does not have to be the same for other watch 3 owners. Im considering returning it but I am so in love with the bronze color and design. Oh and it motivates better to move than fitbit so that's a plus. Good luck anywayz!