It feels like Arch is more comfortable working with what the field gives him, he can throw to players who get open.. improvise, as has been said. But does hold on to the ball a bit too long.
Quinn seems like he always throws to where the play was called. Even longer passes, he launches it to the player it was schemed to go to, which is why it seems like he often overthrows guys, vs., identifying a receiver that gets open and then tactfully throwing to them. He still hasn't mastered looking off safeties, he often only looks at who he's throwing to from jump. He's kind of robotic, which works when he is on but any disruption, he doesn't improvise well.
I'm happy we are winning games, but I can't imagine we will be very successful when playing better teams who lock on to those tendencies (Playoffs). And I'm almost certain Elko and the aggies can disrupt on defense, enough to throw Quinn off unless things change dramatically within the next three games.