Not sure if you'd be able to compare, but was Questor like Wild Arctic at SeaWorld? They look similar. From the video it seemed like a very rough ride- for the body and the eyes!
Forbidden Journey is much smoother, and the acrobatic motion is caused by the swinging of the robotic arm. Your bench will put you flat on your backs and slightly forward and rocks from side to side while constantly moving along a track. It's hard to describe because it's a totally unique experience. About half of the time is spent watching the screens and the other half through scenes filled with animatronics and other effects. The screens are similar to Soarin' although it simulates more dramatic maneuvers.
If she doesn't want to ride she can always accompany you through the line and then exit right before the rest of the party gets on the ride. She could also do a castle tour but that line bypasses some of the interesting parts of the regular queue.
