GMP is by far better than the others. Heck the police cars even came with mini guns that go in the gun rack, they come with real rubber tires, belts and hoses and metal antenna's .The autoart cars are nice but not half as detailed as the gmp car's. There are a couple other company's that make cars as nice or nicer than GMP but they usually only have pre-70's cars. Just a Side note If you check, i think monthly, GMP has a member thing where you can sign up for 25 bux and you get some members Key and a free car. Thats a heck of a deal being they usually cost 100 bux each. that's how i got duplicates LOL. Last time i did it i got a free 93 Yellow convertible.