Actually it matters alot.

I would hate to be in leather seats when I'm on track, sliding every where.

I have my recaros but I still put in a harness.

And its a fact that the Type S makes more power then the Type R. The S has the JDM Type R cams! Meaning even you put in your normal IHE the S will have more power then the R unless the R changes cams.

But really we're not talking about huge KWs difference (even though I know how hard it to squeeze kws out of an N/A engine).

Just go to track! The track put things into perspective.