Except maybe Forza. GT4 will have more cars, forza will have more realistic driving physics, which is what gran turismo prides itself on. 
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Black 2007 Mustang GT California Special
"There he goes. One of God's own prototypes. Some kind of high powered mutant never even considered for mass production. Too weird to live, and too rare to die." - Hunter S. Thompson, 1937-2005
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