It's comparable in that you have the glasses, and you aren't on a track, and it is a simulator that moves with the video... In short, there are different types of "motion sickness," some caused by the 3-D effects, some by 2-D images on screen, some by actual motion, within motion sickness caused by actual physical motion, some is triggered by inversions, some by side to side movement, etc... It is really hard to predict motion sickness in individual people based on the presence of motion sickness in others on any given ride.
As an example, a friend of mine gets motion sick fairly often. At Disney and Universal she did well on Gringott's, she did well on Soarin', she watched the movie at France and it triggered her sickness and she had it the rest of the day. Obviously, with her it was a visual thing triggered by the POV and the wrap around screen in France.
My advice to any ride you want to try that you are nervous about triggering motion sickness issues is to plan to ride it at an opportune time where if it does make you queasy or full on motion sick it won't ruin the rest of your day or trip.