Note that struts do not provide acceleration directly, but by rotating you in relation to the existing gravity. This means they can generally only simulate 1 g situations, unless I'm misinformed.
The hexapod both provides acceleration and rotates to use gravity to simulate continuous acceleration.
The brilliant part is that it trade between these two modes below human vestibular thresholds. So you can’t tell whether your sense of acceleration is coming from movement or orientation.
I took a flight physiology course with Larry Young who modeled the human vestibular system as a set of feedback loops with known gains. And an awesome graduate course entirely on flight simulation.