Firstly 04 sti didnt have black interior,noticed this car the other night on scoobynet,it has the same interior as the wr1 which isn't correct and wasn't a factory option!dccd was never an option on a pre 05 model year car.Reckon this car,because it is an sti8 with dccd and black interior could very well be a japanese dealer market car.
October 2004 is when the dccd 05 car was introduced to the Uk(04/54)refered to as a sti9,this car had wider rear track,longer wheelbase,dccd,smooth style centre console with metallic finish,10 spoke alloy wheels with bridgestone re-o70s,rear arch extentions and red luminescent gauges.
Hope this helps
Gav