550-570hp ICE M3 (4200lbs) vs 630hp PHEV RS 5 (4850lbs)BTW, I am sure the M3 will still smoke the new Hybrid RS5.
In handling the M3 will definitely smoke it, but judging by the 'Ring testing videos the RS 5 will have some proper handling tuning done to it so it won't be as far behind IMO as the non-Comp B9RS was to the M3.