trader388, not only does the Ultimate have that newer styled stock, but the length of pull on it is much shorter, about a 1/2". The new Ultimate does have the one piece bottom metal instead of the two piece metal with 3 screws you are used to. I have the older Classic Stainless Synthetic which has the longer pull, I can't abide short stocks, and I may try to get the one piece bottom metal for mine some time in the future when I am lacking for anything better to do. Mine is also a 7mm WSM
. But those are the only differences I am aware of. Good luck!