moderators: What are the respective differences between Charge 4, 5, vs. 6?

[Victamon]

See also https://community.fitbit.com/t5/Charge-6/How-is-it-different-from-the-5/td-p/5457430/jump-to/first-u... but it has yet to receive explicit confirmation on specific differences from Fitbit staff or moderators (although kudos to those participants who have already commented over there: @N8teGee, @MarkStone, @Julian137).  In particular: what features have improved, which might have worsened, and likewise regarding hardware and overall? And as a vonud, comparing and contrasting against other makes of Fitbit-auuthorized wearable fitness monitors (e.g Sense2) would be nice.  Finally, one more question, while itʼs somewhat relevant: Why does Fitbit classify Charge֊, Luxe֊, Inspire֊, and Ace֊ makes as a "tracker" whereas the others (Sense֊, G.Pixel֊, Versa֊) as "smartwatch"?

[Julia_G]

Hi, @Victamon , if you go to the Fitbit store you can choose the compare option among currently available trackers/ smart watches to see which features each has.  The Charge 6 is the most feature-full of the “trackers” the Sense, Versa and Pixel series are all designated smart watches rather than trackers because they have wider use than just monitoring activities.

[Victamon]

@Julia_G 

What specifically do the Charge models lack wherefore getting the lower "tracker" designation?

I did use the Compare feature for the "available[ for purchase]" wearable devices (which notably excludes all models thag are not the newest of three make) and it seems that Charge5 lacks floors-tracking.. for which is that the key distinction? or just one, or..?