The key difference between the Sense and Versa lines remains ECG monitoring technology, which is only present on the former, with the latter also lacking its brother’s “all-day” stress management tools.
Of course, both the cheaper Fitbit Versa 4 and the more capable Sense 2 come with the exact same 24/7 heart rate monitoring, blood oxygen saturation, in-depth sleep tracking, built-in GPS functionality, and more than 40 pre-installed exercise modes designed to keep up with the active lifestyles of their most adventurous future owners.