Hell no. I've been in a 700+bhp new rs6 and I'd still rather the M5. RWD is what makes it imo and I prefer the looks and interior of the bimmer.I think I'd rather have an rs6, just because I don't see the point of a massive car with silly power that's rwd. The rs6 would me more usable, more of the time, it's the best looking think in its class and the interior is grand.
But they aren't really equivalent given the deals available on the m5. For the money, the m5 is untouchable.
Subjective init blud