I've found the mk7 gearboxes to vary a bit.
My PP GTI gearbox had a slick enough change but I never quite fully got on with it for some reason. I can't put my finger on why.
It had a metallic feel to the change which was pleasant enough but I could beat the syncromesh at times when 'on it'.
Mind you my brain to hand coordination is pretty shocking at times.
When I jumped in the R immediately after signing a few bits of paper the improved gear change was one of the first things to hit me. The gearing was a little too low in the lower gears on the R but the actual change was really nice. I did add a bump stop to the clutch pedal (which I forgot to remove when I sold the car) which made a little bit of difference to things. The engine was so much more responsive once the turbo was on song making gear changes a frequent thing and I never had cause to complain (that I remember).
The GTD gearbox must've been ok as I really have no recollection of it! I only had the car for a very short time and did sub 1000miles so... yeah.
The Clubsport hardly gets driven (someone will get a bargain one day when I sell the thing) but does seem to have quite a slick change. I really enjoy changing gears in that car.
I'm sure there are people on here who are familiar with the different gearbox codes that will know the differences between the boxes themselves and clutches etc.
For all i know all four of those gearboxes might be nigh on identical and it's merely my perception and manufacturing variations that have made the difference