There are lots of other differences between the tops of these paws. I made an attempt at tendons in #4 (those vertical seams on the back of the hand) and a more detailed attempt at knuckles in #5. The jury is still out on where I'll go from here. One question is, how much does this add to the aesthetics vs how much work does it add to the project? Also, it remains to be seen if I can actually make tendons/knuckles **work** in this context. IMHO neither #4 or #5 is there yet.
Onward! At least I have plenty of moral (and adorable!!) support!!