Bit new to this so please bear with me.

I understand your chaos rating modifies the ending and such, and for this playthrough I want to keep it low. But aside from achievements, are there any other implications for not achieving "ghost" and "no kills"? Will there be any difference to the ending/gameplay if I kill/get detected, but still keep a low chaos rating, as opposed to being completely stealthy and not killing anyone (thus achieving a "perfect" low chaos rating).?