ToT, in my opinion, is much scarier than RnRC. ToT is a hotel that got struck by lightning in 1939. Now you are able to go on the maintenance service elevator, which takes you all the way to the top and drops you repeatedly. It's a very scary feeling, although I love it. The themeing on this ride takes you instantly to 1939 and you get a spooky feeling while walking through the lobby and boiler room.
RnRC's story is that you get backstage passes from Aerosmith to their concert in LA. But the streets are busy, so you take a super fast limo. You get rocketed off from 0-60 in 2.8 seconds. With that blast off, you reach 5 G's. It's very fun. There are 3 inversions, 2 half loops and 1 corkscrew. Both rides are very fun, my 2 favorite rides in WDW. And if you do get scared and don't want to ride, there's always the chicken exit!