Well typically receivers have a height and leap/jump advantage, at least the premier receivers. There are a lot of receivers and TEs 6 feet and above but there aren't too many defensive backs with that type of size. I think more often that not a receiver/tight end have the advantage in a jump ball situations but the defensive backs, in real life, with at least attempt to break up the play. In madden there are many instances where the defensive back doesn't even make an attempt, or can't make an attempt