I'm a big Bush fan, but I think SJax is heads-n-shoulders above Bush in terms of FF value. Receiving is the only part of Bush's game which exceeds Jackson's, and Jackson is a great receiver.
Blocking = Jackson
Rushing = Jackson
Goal-line = Jackson
Hold on now;I used to think that Bush wouldn't be a good short yardage guy too... until I did the homework *Reggie is 3 for 4 in the GL (with in 3 yds from the GL), that is 2nd best in the NFC and tied for 3rd in the NFL; as I recall your boy SJax was terrible in the GL last yr.
* Reggie is a perfect 9 for 9 on 3rd down /<3yds
so lets review
Blocking = Jackson
Rushing = Jackson (not by much)
Goal-line = Bush
Recs = Bush