Projected senior year ratings: (DIII)

     ATH.  SP  RB  DE  BLK  LP  PE   BH   P     ST    DU   FT

A:   55     80   7     50    1      10   60  62  60    90   55       B-

B:  30     90   10    35   10     10  60   80  70  90    40       C

As I see it, it boils down to weathe the upgrades in Speed, BH, and passing are sufficient in B to overcome the lower athleticism and def.

What offense?

I think it depends on what you need more, offense or defense.  B is going to be better at running an offense, A is going to be a better defender.  If you're playing zone and have a decent defensive SG, then I'd jump on B for sure.

A easily

If it's for the straight zone defense I'd definitely go B.  If it's the zone/press it's a very close call and depends more on team needs.