I think to the car racing enthusiasts - Gran Turismo is definitively the better series simply because of the physics, car mechanics and actual simulation and sells better because of it. It has what the audience is looking for. People say Forza has better sound, music, graphics and menus - and sure, but that's not really what appeals to the audience buying the games; the gameplay is.
Or at least that's what I'm getting from the online audience.







