Tua just doesn't have the sample size to compare to Allen. He also hasn't dominated games against top tier teams like we've seen from Allen. Also, Allen's ability to extend plays and improvise is just far better than what Tua is capable of. If the pressure gets in Tua's face- he's getting sacked or rolling out and likely not making a big play. I know both players do things better than the other, but we've seen defenses play Allen damn near perfect only to be abused by him because he can extend plays so well. I can't say the same for Tua. It's such a big advantage for a QB to have that skill.
This past week wasn't really fair to try to compare them, though. Buffalo's pass rush was kicking ass. It didn't help that the Phins were down their starting center, then lost their starting T about halfway through the game. That being said, that's the main reason why Miami isn't on Buffalo's level (yet). Both offenses can abuse teams, but Miami's defense isn't anywhere close to Buffalo's at the moment.
Also, I'd like to remind everyone that they sold the farm to compete for a championship, and yet- they're still in Buffalo's shadow. Feels good. Hopefully it continues that way.