The wrx hatch has 19 cu. ft. behind the rear seats and 44 cu. ft. with the seats folded.
A Ford Escape has 31.4 cu. ft. behind the rear seats and 67.2 cu. ft. with the seats folded.
So you could say, as marketing likes to put a lot of play on words, that a wrx/sti hatchback has more cargo room than a Ford Escape
edit: for more comparison, the Explorer has 43.8 cu. ft. and 80.7 cu ft., respectively. So you cuold say that the wrx/sti hatch has more cargo room than the Explorer too!!