Its pretty much everyone fault here that have now selected the R for next car as change up from my GTD and your Clark Kent comments and general happiness with the R in this post does nothing to dim my anticipation, really cannot wait to get the R and experience all what everyone is enjoying myself! patience is being tested 
However, understand your dilemma in reverse as wanted the GTI when MK7 came out but due to high mileage it really had to be the GTD and for first year it was a great choice at 50 + MPG on longer runs but second year, role change and mileage dropper right off, some weeks barely leave my own town, and hence can select the R
The GTD is the perfect long mileage cruiser, it eats up the miles in great comfort and with great economy, Manchester and back with no refuelling! and with the later specification (Sootchuckers is my perfect GTD) the package is more than decent in looks options and performance, and it is no slouch, though obviously no patch on the R, you will miss that and the noises the R makes.
If the R was not such an attractive proposition and must have to find out for myself, would take another GTD in a heartbeat and still little sadness that be changing over.
Really testing out my GTD at moment so can see how clear the differences are with the R in reality when get it, so can help those with GTD moving up to R in future
Not sure there is anyone who has gone from R to GTD though? to give a view to what to expect
As you're going DSG to DSG you'll notice different things with the R.
Firstly off the line you'll find the R much more eager to rev and obviously the gear change points will be different. I've not driven an R in DSG but spent a bit of time in a DSG GTD which was a mixed experience for me. I'd think the DSG was the ideal gearbox for the R if you do much town mileage as the lower gears are indeed quite low and you have to use the box quite a bit in a manual.
The R is pretty electric off the line if you're in the mood but you do have to re-train yourself a bit coming from a Diesel where you spend most of the time sub 4000rpm. The R really wakes up above 3500 rpm so you'll find motorway driving much the same feel but you'll notice the R builds the revs up a lot more quickly when you hit the gas.
I doubt many, if any, have gone from R to GTD but I know a few people who run both on leases.
12 months before you got a stone chip! You did very well there, I picked one up on the way home from the garage.
It hurts all the more knowing it survived this long!
Thanks for the response Sir
Been away this week and that involved some long distance travel along M and A roads and even some ACC and when on a Motorway in particular more than happy to settle on a decent speed and let the miles effortlessly rack up.
Going and Return were both 54 MPG which support that
Though expect the fuel consumption to obviously take a hit the R will be driven the same way on Motorways and hope with the DCC the miles will be eaten up in the same comfort and effortless manner.
The DSG was a must anyway but what you describe is something that would want to avoid and thats multiple manual gear changes as move around locally in the day to day traffic at same speeds as everyone else.
Again its something that grown to love in that with auto hold general traffic and particularly at the peak times are stress free in having to manage the car.
But not moved to the R just to imitate my GTD, the ability to get off the line quicker and more so in the wet was a major attraction as was the times where conditions allow for the stretching of the R's legs.
The GTD is no slouch particularly when you already up and running as the mid range punch is impressive but there is definitely a build up to the delivery from low speed and hence a slight delay before you get away in manner was hoping. So electric off the line is the experience hoping for and even if choose not to use it the knowing its there is imagine quite satisfying regardless.
So I am hoping for a lot of similarities in the day to day to my GTD, as that ease and comfort of drive is a prime requirement, with the added expectation of having a wolf added to the sheep clothing for when moment takes.
Much is preconception based on my own GTD experience and also from narrative here, but will not finitely be able to judge until change the cars over.
Would say a few months yet sadly, but having just come off a very satisfying long haul with GTD definitely mixed feelings and if not had to change would likely have not.
