I've got a Blaster II, but I have to admit, I put it in before the car was drivable so I can't tell you if there is a difference. I should probably put the old one in for a baseline.
I pulled up behind an XT on the freeway on the way to school and had a legacy and a 2.5RS pull up behind me. The other sube drivers probably didn't think much of it, but I was pretty happy!