Overall the better car is the 98 Spec ITR. More HP, more TQ, better Final Drive (4.78 vs 4.4) , better aerodynamics , IIRC better overall suspension and chassis.

The b16B is just a really high strung B16 on crack. you have to rev the shit out of it for any power etc. The CTRs are really good Road Race cars because of the high revs and such and they are lighter IIRC.

For me i just like the styling of the ITR better