Well technically, they're all Grand Theft Autos. It just so happens that Vice City is a spin-off of the original series. Anyways, it really depends as not all Vice City games are equal, and so are the Grand Theft Auto series. I personally loved GTA Vice City Stories but didn't like Vice City as much. At the same time, I didn't like GTA 3 as much as I loved the previous installments and sequels. But I guess since I only like one Vice City game, it's Auto for me.