Irony but I cant speak the AWD G8X since I dont have seat time but can imagine it will be amazing from the launch.
I have an M8 GC and a G80 M3 RWD--- boy are they two different cars:
The M8 GC is the widest BMW ever made and also very long at 206 inches, its truly a GT car for highway speed crushes and AWD launches. The steering is not as on point as the G80 nor is the driving feel. Of course the M8 is a big fatty at 4400 plus pounds while the G80 is around 600 lighter.
Ill often take my M8 on the same roads I just drove my G80 to compare and clearly the G80 is more nimble and will drive into turns and out of them better but will not be as fast thru the straights. The M8 is just got sheer velocity for the GT car it is. The question is what does one want: the scalpel or the hammer. The M8 sounds better (all these comparos are stock to stock) and has the better interior as it should since it costs much more. But the M8 is big and it will show its weight if one tries to get into the turns too heavy.
I love both cars for the characteristics they differ vs each other. If I was stuck with just one, Id probably take the M8 GC since my needs are more along the lines of express way speed and lighter street driving. But damn that G80 does impress:
