not only is ther a huge power diff between the GTSt and the GTR, ther is a big price diff...u can pik up a nice gtst for 12k or even cheaper, but a gtr....over 20, easily. a worked rb20 aint gonna get anywhere near a worked rb26. i have lightly modded gtst (exhaust+dump pipe, remapped ECU, boosted to 12psi) and that is still way way off matchin a stock rb26. u can make a 32gtst move, but u cant expect to keep up with a worked GTR (unless u chuck an rb26 in ther).