You don't get the slack in the one cable while the other is pulling, thence I see better response when you transition the control surface up to down and vise versa. There is less stretch in the cables, actually it just takes longer to stretch the same amount also. Try them, you'll see what I'm talking about.

By the way Bobby, where do you fly in Greenville? I am with the BSRC (Black Sheep Radio Control) Club.