There are a few new stats and about 10 new apps (eg TRX and Gold’s GYM), some of which are only available in the US. Although Fitbit themselves call this a ‘major upgrade’…I’m not so sure.
TRX gives guided workouts and the new PET app does ‘pet’ stuff’. Yet the Women’s Health Tracking app is STILL not available despite being advertised a long time ago. #Priorities
Finally you can now set goal-based workouts.
This might all go some way to exaplinaing why the Versa was on sale last week for about $150 (edit: 20dec2018 $125/£157 on Amazon)