On thorough examination, you'll find that the top model Prestige only has a few extra features that the Premium Plus doesn't have. So keeping in mind the higher starting price of the 330i (around 38k) and the number of features offered, it makes sense to drop your dough on the Premium Plus instead of the Prestige trim. Needless to say, the AWD Quattro system is the way to go no matter which trim you choose due to its excellent driving dynamics and endless amounts of grip.