hehee, its hard to compare but going from a 3" downpipe then 2.25" decat to the full 5-stud to 3" decat saw 335bhp go to 362bhp, 300 lb/ft to 323 lb/ft although more boost 1.5/1.4 bar,... my unichip map was only altered slightly, reducing advance if anything. I had a boost leak with the first run, but it does at least give you some idea.
In reference to my old post, I later found that I had a leak in the actuator pipe, hence the reason for the rising boost levels !;)
I'd just say the car feels more aggressive to drive, more torque but how much I don't know.
joe