Well, it *seems* to me that my Auditing Morningstar was slightly more powerful across two different characters in playthrough 1. Same quest level for both characters, but one managed to complete the optional and the other didn't.
I cannot confirm this since I've long since sold off one of them as I played through TVHM
Meowahaha! Madness, Genius, the only difference between them is success! - Taokaka, Blaz Blue Continuum Shift Motoko Kusanagi is my goddess!