I watched both of these guys all through high school. Both were outstanding quarterbacks and anyone who watched them and said they could tell who was "better" is smoking something. Fouroux perhaps threw it better, Mike definitely ran it better. Against similar competitions (high school, in the same district) they had very comparable numbers. In the one college game they played against each other Fourroux had the better day....so what. Drew Brees got beat this year by a nobody from Cleveland. One game is a pretty small sample.
Oh, and Bustle didn't "change" the offense, he just did what he should have done which is play to his strengths...Mike and Tyrell running. Those teams put up very good offensive numbers, they were killed by a VERY bad defense. I'm not sure if you think Fouroux would have played both ways and somehow saved the defense, but otherwise I doubt he would have put up enough additional offense to overcome our defensive shortcomings.
All that being said, I would have loved those guys to have played together. They were both a ball to watch in high school.