Think what Tim means is it handles so much better than the mk4 which it does.
I don't own a 1 series but my old man does/has (118d M and 120d M) and have drive them for many many miles. Yes the ride is harsher than a standard mk4, fuel wise its the same as my 150 and the driving position is down to the driver. Seats are much better in the bmw, engine is quieter than vw's, not as torqie but pulls right to the redline smoothly and will out pro form any mk4 on twisty roads with ease.