I've run the Comp and the Smarty, but I never tested that combo on the dyno. As far as preference, I like the Smarty/TST because the power delivery is more smooth/linear. The Smarty/Comp has power, but I think the Smarty/TST has more power on the top end. Judging from my experience and from a friend who also ran both combos, it pulls harder on the top end and gets hotter on the top end with the TST.
The other main thing I noticed is that I have less smoke on the bottom end with the TST, the power is there, but it's not as smoky.