im sure turbo's are actually that much better. im not sure if this is a gen1 thing or what but measuring the cfm that a kenne bell flows and a dinky powedyne, the tiny powedyne flows slightly more. the 2.2 kb for a gen1 only flows 800cfm, where as a novi 2000 flows around 1600cfm. from what ive read at a certian power level the roots blower is a pretty good sized restriction. that and the turbo is so much easier on the engine itself.
dont get me wrong i love that scream of a roots blower but id take a turbocharger over it any day of the week and twice on sundays.