I drove the RS7 first...liked it, didn't love it. And that sportback...Yuck. I guess I like the "plain Jane" understated look of the S8...oh...and the shifter...this is another thing that separates them...probably doesn't matter to most...but the RS7 shifter looks just like the S6 shifter...LOVE the S8 shifter, although it DOES take some getting used to. At the end of the day, the D4 S8 is about as rare a car as a RS anything...And 11.83 @117 bone stock...against a modded Challenger Hellcat.
2010 XC90 exec, winter machine (V8 of course)
2004 RS6 official Canadian edition, Daytona grey, (best colour!), summer edition
2011 Q7 TDI, general alrounder