The Axis is probably a bit more 'punishing' of bad form, if you're looking for the "disc as teacher" of the two. Although I'd say it's more rewarding of good form. Neither are the type of disc to turn into a total disaster on a bad throw, the way the Comet and the like will.
I'd say go with your gut and bag the Axis for starters, since it's comfortable in the grip for you. That leads to a good mindset pre-shot, and 90% of this game is half mental .
Beautiful