No, not really... the suspension trauma happens because the harness straps squeeze your arteries shut, blocking the bloodflow and causing stagnation. If the harness has fewer and/or thinner support straps then you will have the same body weight spread across fewer/smaller points, increasing the pressure and making the problem worse. Blood becomes hypoxic really quickly if it can't move.

I've given safety awareness training and first aid response training on this topic (for work, not for recreation).