From what I've read andwas told by the guy I bought my '07 Allegiance from they've changed the cams a little to releave more of the stress that causes torquing on the limbs. Beyond that I believe there is very little difference. You should PM BowTech Shooter aka Pat Dinan. He works for Bowtech and would be able to give you an accurate answer on this. Good luck with either choice. I bought my last Subday and finally going to shoot it this weekend.