The SP23 produces 115kW. The standard DC5 produces 118kW. Both at 6500rpm. This is a drivers race IMO (assuming your car is in good condition with that many KMs on it I hope you've been looking after it!). I don't know why the other guys are saying he's going to walk all over you. It will be close... If he had an MPS it would be a different story.
Good luck mate and let us know how it goes!

