I believe the seat 1.8T is faster than mk4 1.8T because of the seat with lighter body,i test drove both mk4 1.8T(150bhp) and mk4 1.8T(180bhp)i still fell my vr6 is faster!The reason i am thinking of getting mk4 1.8T is because i never own one and just fell like test the car out but after reading all the reply maybe i will change my mind!