Buster vs B-Man would be a more vaild comparison, both have ~325rwkw peak (Buster 328, B-Man 323). Buster's TD06-25G/10cm rear had more all over the curve, boost coming in 1,000rpm earlier + a higher peak. B-Man's 3040/1.22 A/R is capable of far more - his is only in initial stages of development whereas Buster's was at it's peak.
(I should just shaddup and let both of those guys post here, but I blabber too much)