Came across a Seat Cupra R, the fast one at Pod other weekend, it was running high 10s passes.#
Spoke with the owner, he has done similar to you, running 560PS, he also put the AWD rear-end in the car from the Golf R / S3 to make it AWD and was running it on Michelin Cup 2's, seriously quick bit of kit that looked completely stock, even under the bonnet looked pretty much factory.
Yes, there are two of those with the 4x4 driveline. I know one of them very well, I helped him on many of his decisions for the upgrade.