It all depends. Nature vs nurture and all that jazz.

Without the massive identity crisis for Loki, and everything that came with that, he might hang onto sanity better. He might still be a bit of a diva, granted, but he might be a sane one.

Thor ... is hard to call. He's just such a nice guy he could accept it ... or he could lose his temper. Either way ... It's all one big maybe.