I'm not certain about that but the classic was just moded as it moved up to Version 6 so with the changes that where made in 2005
Modifications to the range for 2005 included three-spoke steering wheels, a new centre console, improved switches and controls, a plusher trim and the braking system was uprated to give a firmer pedal. The WRX STi models were uprated further with torque up to 303lbft at 4400rpm, the exhaust system was enhanced as was the intercooler. A new front helical limited slip differential gave manual control over front/rear torque split and its DCCD control module could make lightning quick decisions in automatic mode via the newly introduced yaw rate sensor. Wheels, suspension and geometry were also uprated to make this the sharpest STi model ever.
Could be wrong though.