On this photo I have added one set of swirls of "group A" onto the set of swirls of "group B" to make clear their (basically) IDENTICAL geometry.

I think it is not necessary to explain (again) why this fact speaks a clear language! One of fakery, at least should both sets of beads have been sold as being old and coming from Venice!

This beads - both groups - are contemporary non-Venetian products!

PS
The word, or the supposed reputation of an Ebay-dealer is no evidence of any kind whatsoever! I agree to the notion of a reliable dealer, but strongly!! disagree on this dealer's knowledge!