The Mazda's suspension is a little bit stiffer in cornering, the overall ride in the Mazda is smoother and quieter, and I prefer the tap shift in the Mazda (you tap down to shift up).
The G6 is quicker, the instrument cluster is more informative, the G6 gets better fuel mileage, the stock sound in the G6 “was” better (the G6’s sound system has been upgraded).
There aren’t a lot of better or worse differences; both cars are nice looking, sporty and functional for a family of three. Since I’m a family man I hold back from doing any really wild modifications. I do slip in a tire or rim mod when I can so I don’t appear to be an old stick in the mud.
If I had to choose right now to get a new G6 or Mazda6 I think I would chose the Mazda again, but my wife would, know doubt, choose the G6 GTP.
Like I said, they are both “Nice cars”.
