Lovie Smith is still in Tampa running that team, which means they will want to win with defense and rushing with a QB who keeps turnovers to a minimum. A protect the ball QB like Russell Wilson or Aaron Rodgers would be ideal for Tampa, and Mariota is that guy.
Then again, Lovie drafted the perfect opposite of that kind of QB in Chicago, in the 1st round no less. So who knows.
I don't think Mariota is a system QB. I think he's most like Matt Ryan if Ryan had Kaepernick tools. Winston kinda strikes me as being in that Cam Newton / Andrew Luck / Big Ben category.