Board Thread:Naruto Discussions/@comment-26506584-20150718030643/@comment-25622409-20150730111256

Sakura's medical techniques are useful over a large number of people, but Karin's is the better one if only a single person needs help. She even healed Tsunade after she was CUT IN HALF by Madara.

Karin personality is a result of various things. Even when she was a young Genin of Kusagakure, she was very nearly sold into slavery, and then rescued by a psychopath(Orochumaru) who quite definitely ran a lot of tests on her. Her life story wasn't exactly as sheltered as Sakura, ya know?

Also, if you really want a reason to like Karin, I'll give you a foolproof one: She is an Uzumaki. ;)

Sakura's character development has to agreed to be one of the greatest failures of Kishimoto. I liked her a lot in Shippuden, but the 699th and 700th chapter destroyed it for me. She was back to square one.