my experience is the opposite, jp8 isnt as strong as r4w in the stim department.
Although, I suppose dosing is the culprit. I was doing 3 pills r4w, but while on jp8 was only doing one scoop as find it pretty tame compared to some other preWOs, but much better focus than the run of the mill preWOs.
Nos Ether is pure gold though. I suppose jp8 pre and Ether post would be my ideal GD stack.