Saw this earlier, decent enough video if only to show off the facelift R. The S3 is so bland looking, particularly in black, think the R looks much better. The S3 alloys don't do anything for it either.
Yeah, the Audi has the better finish inside, but the R is hardly miles away, the new tech in the facelift brings it in line with the Audi. Also, I prefer the cloth seats of the R, leather may look good but unless you have a seriously bolstered seat then you're sliding around when pushing around corners.
All in all, I would certainly pick the R over the S3 every day of the week.