Well, we also have to remember that solid covers aren't great for big angles either. Given that you make the correct moves at the correct time, I can play the solid and the Nano from anywhere, but if you're expecting angle in soup from low diff balls, it isn't going to happen. You can get a stronger finish from deep with higher diff balls, yes, but that's provided the oil volume is there. There are just too many variables to say definitively one way or the other, because you change one or two and the whole situation is different.