It would take a lot of power alone to ruin the clutch ( S3 has 260bhp on the same clutch), its the torque that kills them
My Stg1 GTI is slipping the clutch and has 311lb/ft torque. Not sure on the exact figures it can handle but basically if you remap your car, expect your clutch to slip after a while
Yes, all S3's, Golf R, Ed30's have the same clutch