Super Stock Springs...do they make that much of a difference

I purchased a set of B body spring from Bob Mazzolini this year and a move in kit for my 67 cuda . the rear end is very stiff like S/S springs but doesn't sit as high in the back like the S/S. I haven't been to the track yet so I couldn't tell you if they work better

Dart 440 4 spd
I here Jason isn't with Bob any more, he opened his own shop in Corona