I wonder which is worse for motion sickness. It seems like spinning, the more intense activity, would be, but there is (for lack of a better term) a kinetic logic to spinning that the body may understand. Rotating constantly changes the bodies orientation in relation to forward motion and is unaffected by curves and dips. It seems that, in a dark environment, this may actually be more prone to cause motion sickness. I don’t know.
Particularly it would likely be made worse by the screens as the part of the brain not lost in the illusion will know those movements are not exactly in synch. This is common on motion simulators and dark rides with screens for some. I think this will be made worse for many just by that fact.
Then there is repetition, which is why many carnival-like flat rides find people sick more often than a well designed rollercoater.