I don't think they are comparable, either. I rode the Matterhorn in 2002 and thought I would get shaken to death! If memory serves, there are separate cars, not a long series of connected cars. You start out at the top of the mtn and wind your way down, kinda like a mini Space Mountain.
BTMR is a lot smoother and a lot more fun!
EDIT: wanted to say that my sis is terrified or roller coasters. I got her on BTMR in May and she loved it!!! She even rode it twice!