Felpro gasket failed almost a year ago just haven't updated my sig.

The car is now stripped of everything bar the carpet and a 6 point roll cage.

I don't know what suspension setup this guy has or wheels tyres etc. There are lots of possible differences between the two cars and the conditions under which they were timed. Without lining the pair of the cars up at the same time on the same track using the same timing equipment it's all pretty irrelevant.