I don't understand the charts TBH, the first one says your stock S3 should be 235bhp or it could be 215, difficult to see(thought they were 225 as standard), it then says that your stock wheel power is 149bhp and assumes that the engine is at 233 bhp (thats a 36% loss due to the drivetrain).
your new figures are 252bhp ATFW taken from 179bhp ATW (29% drivetrain loss). Assuming the same loss due to drivetrain you should have 284bhp ATFW.
was this done with the rear drive disconnected?
The charts look a bit "spikey now", thay have lost that nice smooth curve, they also show a drop off in power and torque at around 800rpm lower down.
sorry to sound negative.
how does it compare when you drive it?
charts mean nothing compared to "seat of pants feel"