Lol, no two guns are identical. They are at least 1 digit on the serial number off, and that makes each one unique and special to me !
Honestly though, I don't consider myself to be collecting "multiples" of the same gun, but I do have an interarms SS ppk, an interarms SS ppk/s, and an original walther wwII ppk. I also have three different 1911's, but they are pretty different from each other also.