Well she is an Uzumaki so she has very good stamina. She also is able to heal herself from bad injuries. Not to mention that her chains allow her to attach Hinata at long range and The chains themselves are extremely powerful and there is no proof that she cannot control them at will so regardless she has a very powerful weapon. I'd say Karin has the arsenal and the brains while Hinata has the taikutsu feats and a very good clan ability. Honestly it could go either way.
-Just because her fellow uzumakis had good stamnia doesn't make her like them
Uzumaki known for chakra force not stamnia /big chakra pool
(she can't heal more than twice a day yet normal ninjas healed multiple people without losing chakra... Her chakra feats are poor)
-like i said she cant heal more than twice and thats alone make her lose stamnia .
Not to mention her healing wounds wont help her against hinata style at all
-Chains are fine ,but there is nothing proves she can control them good either
Her control was poor and it got dodged and disappeared in a second.
