The whole point of clones is that they're nearly to completely identical, so big differences are interesting. If it were done well, which it obviously isn't (and, oh my, the fucking PAINT), it could be interesting.

A lot of older shows have done it quite well when addressing this. When Crichton gets duped in Farscape the two then play Rock-Paper-Scissors against each other and draw every. single. time. because everything about them is identical. So they can't even try to trick the other by drawing then doing what wouldn't be expected the next time because both of them end up doing it.