If you only want to upgrade because of the insert. I think you might be disappointed. The insert on the zzf v3 or vsf is not going to be that much different then your v2s.
That’s not completely accurate, even if he upgrades to zzf v3 it’s still a big step up from v2s just in bracelet alone, the v3 uses same exact bracelet from arf which if he doesn’t have in his zzf would be another $100 plus upgrade. Plus more things they upgraded. Not fair to undersell their upgrade. But I still ordered a vsf just from compairing pics alone