I wonder if he has driven an "M4" coupe, or just the M3 sedan. His verbiage makes it a bit ambiguous. Not that it matters too much as they will likely be similar in performance. But I would think the M3 sedan is a lot further along in development and thus a better representation of how the final car will be.
A gen-u-ine BMW eff-eight-zero with them tandem clutches in the transmission and that dad gum sun roof on the top-a da cawr.