The Fusion has a moderately different sound to the other two. The Camry's might be a little different but I don;t know as I haven't owned one yet.
Anyway, I used my Jimmie Johnson NASCAR, which is closing rapidly on a 1000 Ticket due to mass usage from the American Championship. All I needed to do to it for the win was maxed out the downforce and added Racing Softs.
I said "Ring"-Challenge (Seasonal Events #2 Last Race NASCAR on Green Hell) and I made an Oil-Change on my Fusion
=> to much KW/PS/HP
=> had to buy a new one
Probably the dumbest thing I did is spend 500k buying Carl Edwards Fusion, only to get a free NASCAR (Dale Earnhardt) the same day
Anyways, I still use the Carl Edwards Fusion, 870hp and close to logging 2000km (Indy Grinding). Gifted the other one away. Used the same car for the ring challenge.