The talent level between Mathieu and Jenkins isn't even close, that's the difference. Jenkins was a top ten pick if not for off the field issues.
i dont think the OP mentioned anything about using a first rounder on mathieu. as i had posted on another thread, he would be worth a shot with a 4th rd to third day pick. no one can seem to look past his off field issues and as the guy you quoted, that was his point with jenkins. Jenkins had tons of off field issues, even had academic issues, had to transfer schools and play for a smaller school but turned his life around once he got drafted (jimmy smith for baltimore had off field issues also, look how he turned out). MAthieu would be worth a 4th,5th or 6th round pick.