You get better performance using OXR, and can mess around with the toolkit in games that don't crash with it active. With the Pimax open composite has far less hit and miss, i've been defaulting to that with uevr. Gravel would be a good example, it ran like a stutter fest with steam vr, swapping to open c, silky smooth.
Nothing has phased my computer yet from what little i've tried. Pinball FX maxed in game at 3600* runs perfectly and is everything it needed to be, my dream come true. Cool stuff, Supercross, Bloodstained ROTN, Crash 4, Rad Rogers, and the very cool Jedi Fallen order. Jedi is simply a masterpiece, the epic scale of the opening prologue dumps on virtually everything released to native VR over the past 7 years. As soon as you are standing in the train with all the other characters, you realise it, and it only gets better. Sliding down surfaces, playing laser blast deflection seeing the fire coming toward you in the depth of 3D, all epic and killer in VR.
Still have big backlog of stuff to try out, but in short massively impressed so far.