I think trubisky is going to be the stereotypical bears QB, ala jim mcmahon, rex grossman, or jay cutler. he's not going to be the reason you lose any games but hes not going to win them for you either, that responsibility is going to fall on the defense.
Stafford hasn't had a defense or an o-line like trubisky had last year. This year will be the first year he has a Half competent o-line, a good defense, and a Good run game if kerryon stays healthy. i think the lions are in the same spot the bears were last year, they're the dark horse candidate, i don't think anyone has really recognized how good they can be this year.