I think both Mariotta and Bridgewater are good prospects and likely the choice between the 2 will come down to intelligence tests and interviews, stuff we don't get to see. However, if a team needed a QB right now, I would say Teddy B. If the team had time to develop him, I would go with Mariota.
Mariota is brilliant for his age. People forget, he is young....VERY young. He'll be 20 in a couple weeks.
They are both good prospects tho.