My two cents:
I have i7-6700K/4.5, 1080, 16 gB, Rift-S:
Stennis solid 40fps, very happy with that
Same situation SC (no static objects) 30-32fps, not so happy, gives me nausia
I hope ED will find some room for improvement, because i think the SC is great. I love the comms and the deck crew. And of course the ball viewer, great improvement in the Rift-S
Hoping for the best!