We love both, but for different reasons. SDD is super smooth and more thrilling than expected, but tame enough that my roller coaster adverse kid will ride it more than once. RnRC is super thrilling and the music adds extra fun. When you roll back into the launch station and pick up any of your organs that fell out during the launch, you will have that flushed feeling of the adrenaline rush this ride brings every time!
It will be sad to see Aerosmith go, but I am cautiously optimistic for the Muppets era of RnRC! There is a lot of opportunity for it to be funny, so I hope they take advantage of that.