Quote Originally Posted by Slashley View Post
There is no difference for SSRs.

You'll still want to do 10 pulls, because you're guaranteed one SR that way (which are usually 15%). If you have every single SR you care for, then you can safely just do single pulls and lose nothing.
We can't be sure of that without knowing how the gacha works. 10 pull guarantees an SR or higher, and you can pull 9 R and 1 SSR. Now it's possible that the SR chance is just increased for one of the rolls, in which case the SSR chance is the same. But it's also possible that the game rerolls if there are 10 rares, in which case the SSR chance is higher.