User blog comment:Miskos3/Fairy Tail 526: My Name Is..., Review/@comment-68.102.118.10-20170313072127/@comment-125.212.122.68-20170313122342

The big problem is that for some reason Mashima did not properly execute and flesh out the 'master of magic' character template (or perhaps, he wanted to subvert it altogether, even if it meant betraying readers' expectations)

It's not even the copying that's the issue, it's the fact that the limitations of the copying somehow align with the problematic distinction between caster and holder magic.

As for a match between the two though, I can see that Irene (without even resorting to dragon form) has the advantage of being able to exploit more things about August's limitations, but IF enchantment by itself (as distinguished from the magic output of enchanted items) is a caster magic, then I'd assume August can replicate that