The GT is the naturally aspirated version running the 5S-FE, a 2.2L four-cylinder making around 130 hp. Comfortable, reliable, slow. The GT-Four (ST205) is the one people chase. It got the 3S-GTE turbocharged 2.0L making roughly 242 hp (JDM spec), full-time AWD, and a more aggressive suspension setup. The GT-Four also came with bigger brakes and wider fenders from the factory. Mechanically they share a platform, but the drivetrain and running gear are different enough that parts rarely cross over between the two.