The trunk in my W8 was one of the first things I noticed when I was swapping the contents from my 2001.5 fwd v6 into my new car. The W8 has a donut spare as opposed to the full-sized, also the seats don't fold down flat like they did in the FWD. The benefits of 4-Motion and the increased HP far outweigh the smaller cargo area! Now I have to pass my skis through the arm rest panel rather than simply folding down the rear seats, no big deal unless I'm riding with a snowboarder (they don't fit through the armrest) my 2 cents.
the w8 has the same 4mo trunk, the extra gas tank makes the W8 have a donut instead of a spare, this is how we get the same trunk space as a 4mo. so the trunk is exactly the same in the w8 as the 4mo, but we dont get a full spare