Too hard to explain? "It's a factory AWD turbo 4-cyl Mazda6 with upgraded suspension and 18" wheels."
The other visual differences are nothing to write home about.
Next thing out of their mouth is one of two quotes. Mazda never made an AWD car or, Mazda 6's are all automatics. The second statement isn't true even if there wasn't a MazdaSpeed, but I have heard it more than once.