do you know how the a4 2.0T goes compares to the gti, in mpg, performance etc. etc.?
Yes, slightly slower (A4 0-60 7.1, Golf GTI 2.0T 0-60 7.0), uses about the same fuel (both 36.7 on combined cycle) - so in terms of bare performance and fuel consumption figures nothing it in...
Having driven both, the Golf IMO, handles better but that's just that, an opinion...