Tom thats a load of old crap!
1).Scott is Heavier than Mike!
2). The LET engine is heavier than Mikes (bigger inlet manifold & turbo bolted to the front!
3).F28 is heavier than F20.
4). Mikes car is completely stripped out and running around 4 litres of fuel, Scott had around half a tank and full interior when he did his 13.8!
Last point is if Scott ran weight for weight against Mike his time would be a dam sight faster than 13.8!
I think there all fairly valid points!
BTW i think Mikes car is closer to 230bhp