This is a tough call becaouse I think they are about the same. Just good enough to be starters, hard to bench, but will never be great.
I voted O'brien as a knee-jerk reaction, however I think they were very similar. Both did not have the stuff to get to an AFC Championship Game when they did have the talent around them and did not have the stuff to make the playoffs when the talent began to evaporate. Chad got lucky with the schedule and injuries last year as the Jets suffered no serious injuries at all and had a host of weak teams to run through.
I disagree. Pennington got the Jets to the 2004 AFC championship game. He put them in field goal range twice with the chance to win the game.