This may be all in my head, but here's what I see....
Let's say I need to draw straight back, center ball/no English, but I strike slightly to the left or right of center... it seems to throw the object ball more than if I were to make the same mistake with the larger diameter shaft. The larger Classic shaft seems to be more forgiving in that respect.
Basically a long way of saying that if you're using a smaller diameter shaft, it requires more precise cueing, in my experience. I'm also playing on 3 7/8" pockets though, so a ball that might still fall on bigger pockets will not fall where I play, so that little variance can make a big difference in whether I run out or rattle.
ok i see what ur saying hmm yea this is hard one