Only difference between 03/04 are color options. Both are incredible vehicles. If you're looking to buy an unreal car and a great price check out my buddies:
http://www.svtperformance.com/forums/terminators-buy-sell-254/710358-feeler-03-dsg-kb-2-2-cobra-ccws-low-miles-much-more.html
http://www.svtperformance.com/forums/terminators-buy-sell-254/710358-feeler-03-dsg-kb-2-2-cobra-ccws-low-miles-much-more.html