The quickest option is can be to make a twin in CAS, redress them, and delete the original, but you can also remove aspiration rewards, etc., etc. with cheats in live mode. Between these lists, you should be able to find everything:
https://simsvip.com/sims-4-cheats-codes/
https://www.reddit.com/r/sims4Cheats/wiki/index
Oh - except possibly some hidden ones. You can use the Show Sim Info mod to see those, and I have this bookmarked to find how to control them: http://forums.thesims.com/en_US/discussion/900951/hidden-traits/p1
There's probably a clone-in-CAS mod? But I don't know of one.
