I think the difference between the Bengio and most other rip protectors is it was developed by drivers and continues to receive a lot of feedback from drivers, I’m not convinced that’s the case for the big multinationals or for the cheap ones.
I had bought a forcefield rip protector as a sort of development project.
What it made me realise is you need that hard outer layer in a kart. The way they did the cushioning was really smart, light and breathable but it need that hard outlayer to protect against bolt heads in the seat. It also needed a little reshaping to suit a karting seat position (its really a motorcycle rib protector).