Following some confusion I decided to do a side-by-side comparison.
There is clearly a difference between having the Rearsight on the gun or not. There was comments made about "There is no difference. It's just the buttpad/RBP". This is clearly not the case;
AK-47N Buttpad/RBP Off:
Bullet Impact comparison:
AK-47N Buttpad/RGP On:
Bullet Impact Comparison:
So clearly there is a difference in the visual recoil for both with and without the rubber pad. It's especially noticeable on the comparison without the buttpad/RBP. However I don't think there is an actual recoil reduction to the gun.