@Babylon Mariota being favored by one particular team because of their particular offense and coach doesn't make him a better QB prospect. I'd still argue that they'd be better off taking Bridgewater.
As for Bortles I agree that he's being overlooked by a lot of people and I like him a lot as a prospect but I don't think he's on Bridgewater's level.
It's hard to say much about the competition level argument other than to point out the Florida game like you did. We're going to have to wait until he actually makes it to the NFL before we see him play top competition on a weekly basis but from what I've seen I like his chances of succeeding.
@bamafalcon I agree and I think it was his lack of weapons that caused people to overreact to his INT #s as it was more of a case of him needing to force things but I think there were real concerns about his decision making and that stuff scares me a lot more than any concerns I have about Bridgewater.