I chose the 07 Tribute for the following reasons.
1) Less hand shock. The allegiance is so light that you feel alot of vibration in the handle after the shot.
2) The Tribute had a better brace height for a short ATA bow.
3)Tribute was a little quieter due to the fact that the limb pockets are angled back slightly more than the allegiance. At full draw the limbs are actually a little beyond parallel which absorbs more shock after the shot.
4) Other than that, the bows are almost identical. They are just that close. You really can't go wrong either way. They are both great bows in my book.