Cooled steering wheel? Are you sure about that because I’ve never heard of that in any cargranted I haven't sat in it, or anything, but from an engagement point of view, is it really better? all controls are capacitive touch, meaning no physical buttons, and no feedback, also, the SWC are the same, so if the palm of your hand accidentally hits one of the controls while driving, that would get annoying.
also, the engagement of reverse on the shifter is press down and move the stick left and up. not a huge issue, but apparently (according to YT influencers) the down press on the shifter can happen at any time, so if you are going into 3rd from second, you the shifter might sink under your hand. not a great feeling, I'm sure, but you might get used to that.
I'm sure the heated and cooled steering wheel is great, as are the seats which are heated (and cooled too) I think, also the sunroof sounds cool, if you're into that.
IMO, the Golf R is great to use as a tool in negotiating the price of the GRC (if you can find someone that will commit to a MSRP price for it), but it's going to be a completely different experience from the GRC. more of a grand tourer with annoying buttons, rather than a rough and tumble hot hatch, the dealer doesn't need to know that you may not ultimately be interested in the Golf R, but if you can get a written price, you can use that to help get a lower offer for the GRC. it worked for me at least.