You're just proving scanesare's point there - you're focusing on just the advantages in pulling away from a standing start. When you say "my lady's GTI would struggle", I agree - yes it would, but only at pulling away and your R would be equally as bad at stopping or cornering (assuming an even/trailing throttle - if you're booting it, you shouldn't be out in those conditions).
You are wasting your breath. Lots of us have tried to explain this simple concept to CHB100. He is NEVER going to understand it. 
For me being able to have traction on a slippery slope and on the flat to gain momentum is the most IIMPORTANT FACT. While others with 2WD spin 240 horses without progress.
Once on the road I still feel more confident in The knowledge that I’m less likely to get stuck! Albeit similar both may be in gentle driving in icy conditions.
Friend I do have both to try in those conditions so is my true experience and not garnered from hearsay
Also you seem to think I am claiming something I am not to the point of boredom.
Please come and have a test in mine in such conditions in said situations or any come to that.
I won’t bother with rolleyes.
To repeat to OP if you can afford all incurred costs buy an R over anything else.