Actually, based on the comparison above, I think I might put the LA for the awakened tiger around +3.
Ftr13:
13d10 = 71 hp
BAB +13, Full attack +13/+8/+3 greatsword (2d6)
Saves: Fort +8, Ref +4, Will +4
Slightly better hp (which will get even better with a Con bonus), higher 1st attack but lower 2nd and 3rd. Still lower damage on each attack though. Poorer saves, but two extra feats. Oh, and one extra stat adjustment. Tiger doesn't have any hands, but does fine with his natural weapons. Could make it hard to drink healing potions etc.
Seems reasonably balanced...
Ftr13:
13d10 = 71 hp
BAB +13, Full attack +13/+8/+3 greatsword (2d6)
Saves: Fort +8, Ref +4, Will +4
Slightly better hp (which will get even better with a Con bonus), higher 1st attack but lower 2nd and 3rd. Still lower damage on each attack though. Poorer saves, but two extra feats. Oh, and one extra stat adjustment. Tiger doesn't have any hands, but does fine with his natural weapons. Could make it hard to drink healing potions etc.
Seems reasonably balanced...