is there any real difference?

ok, so ive really been wanting to know if there is any real difference between two heros of the same profession (ex. dunkoro and tahlkora). some people say that one is better at healing or protecting than the other while other people will say the opposite. same goes for olias and the master of whispers. does one use certain skills better than the other or is the only real difference what the hero looks like? if you could give me certified information and not personal experience or opinion i would greatly appreciate it.

No.
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There's no difference. People start that rumor because tahlkora originally comes as a prot monk, and dunkoro as a heal monk.

aesthetics. i think margrid's hotter and i feel like i need to drive goren to his day program with a fresh pair of adult undergarmants and a packed lunch.

as far as i can tell, there's no difference between any of the classes either (only the non-ai stuff like armor, energy regen and primary skills).