Kirinji is overall far better then unohana and is more serious character by itself.
There is no doubt, kirinji is much better at PVP, his only bad thing is that he only hit's 2 random enemies(Without Ex skill i think)
His speed is much, much better then unohana's and other stats too, only thing i hate about my kirinji is his Physical defense i think is a low a little bit.
Unohana is better in PVE because of her growth rate(400%).
Also she is meant to be played as secondary support by my thought because she is here to finish one of enemies and because of her low speed and yet little bit i think she is outdated.
In other words she is not bad if you are lower vip, but if you are higher vip try to reach something better.