I don't know how much more for the same tyre non-RFT and RFT, but normally people go Bridgestone RFT to Falken 452 non-RFT so you're not comparing apples with apples - a cheaper construction and a cheaper brand.
Ok, I'm sure it is faster but just don't feel it, maybe be cus of th turbo, or the fact it has done 10k without a service? What about the steamy lights?