How many different keycaps exist in both ANSI and ISO Cherry profile 60%, 65%, and 100%?
there is no definitive answer, there is a lot of variation, and pretty much all keyset will cover both ansi, iso and 100%, so if you were asking for number of different keysets there are new ones every day.
if you are asking for number of keys on a layout the clue is in the name 100% is 101 keys Ansi, iso is 102 winkeyless, 103 with the 2 winkeys+gui key, 60% is meant to be 60 or 61 keys (60% of 101 to 105) and 65% about 65 keys +-1
there is not really a standard 100% sometimes goes up to 114 keys.
trying to help but if you could be a bit more precise in your question we may be able to do better