Power delivery? Mate - the Subaru is night and day in terms of raw on-tap power to the RS. I owned 4 RS's over the last 5 years, from standard, to mp350, to mr375. My last RS was mp350 (I thought that level of tune is the best compromise) and I'm really missing the instant kick of power from that car. It was there in every gear, but having also had one, you will know that.
My old RS still hasn't sold, it's sat at Perkins Garage in Essex. I tried to do a deal to get my car back, but it was going to be financial suicide. God knows what this Sti will be worth in a few years time. Think we'll get a shock.