Sakura since she was trained by tsunade and when it comes to looks it's of personal interest sakura as well. Her kinky pink hair gets to me.... Personality both are equal.
Karin for me. Both are thirsty whores who would do anything for Lord Sasuke's D, but I rather get an std while while doing someone hot than some ugly drama queen.
Besides, she has Uzumaki genes, which means an uchiha kid with with rinnegan!
Looks? Can't decide, they both have bad designs.
Personality? Sakura, Karin's wet shorts for Sasuke isn't a personality so..
Overall? Like asking which form of Diabetes you want. They both suck..
Karin is more stalkerish than Hinata! She really is crazy to wanna be with a dude that ruthlessly tried to kill her. Shes at least funny though, but to me theres no question Sakura is in a league of her own (overall character depth)