Depends on which STi he is talking about.
If your comparing the 09 STi to a 1995 - 1998 R33 GTR, no comparison, compare the R35 GTR to the 09 STi.
I must say tho, STi = Rally beast and GTR = Tarmac Warrior.
Each to there own.
STi will be a great handler and great for quick squirts, GTR will have more top end in the long run, but Nissan did not sacrifice any low down.
I can relate to Deano 1 post, but that's like most stereotypes you have on the roads.