Ross good mate of mine Dave might remember him from nur trip asked him for his opnion worked for revo for years had a 550+ demo golf r drove lots of em..here's his response
"Mk7/7.5 R pretty much same, based on later very good MQB platform. 7.5 has the later 7speed DSG but also only had one year production before they got GPF filters (lost 10bhp and something else to go wrong)
Generally pretty bomb proof car. Just usual stuff like coils, some bushes and if your unlucky the DSG mechatronics unit. But I’ve been away from them for a few years so maybe more problems have come to light since
Mk6 R completely different thing. Based on older mk5 Golf platform and runs a version of the older belt driven TFSI engine. Very well known engine with quite a few issues but nothing too serious.
Mk7/7.5 is a sharper drive than the 6 and easier to get big power from. 6 is much much rarer so more collectible."
"Are they dull. Depends on what you’re comparing it to. Compared to a Scoob yes they are a bit bland and lacking in drama but they are a much easier car to live with everyday. If you want something fun step back to a mk7 GTI Clubsport or TCR. Same bigger turbo engine as R but 2wd with front diff so lighter and more pointy. Also looks better than R and is less predictable. Also remember Seat Leon Cupra is a good value alternative"
Also recommend i30N