hahahhaha *cough* bullshit *cough*
well think of this .. with the money u save on gettting the rb20det, u can get a new turbo or ecu or whatever u want.. then which will be quicker??
engines both have there good and bad points.. sr20det is an alloy block adn the rb20 is the cast iron... sr20det has a timing chain rather than a belt.. rb20det is a 6cyl thus more torque
both engines are bloody awesome.. but it always goes down to money in the end...