FrogReaver
The most respectful and polite poster ever
I don't find the casters meaningfully different, no. In a game with zero MC then a little moreso. It's mostly access to a handful of different spells and whether or not i have a good idea for one of the other mechanics which most often isn't really what its fluffed as. That's rare though.
Obviously there are mechanical differences between the classes but nothing that, to me, that separates the classes in a super meaningful thematic way. I never said there weren't mechanical differences btw, only that I didn't find the differences compelling from a character design standpoint, as odd as that sounds.
An example: you mentioned wanting to be a skill monkey and picking bard. I would call skill monkey a meaningful thematic difference between bard and the other casters. You do not?