The whole XC EC thing is essentially the same bike. I believe the XC just came without the road registerable bits and pieces (blinkers, brake lights, etc). I think the MC models had lighter 2K2 ignitions, but as I said earlier, I've got no experience and little knowledge of the early models. Only delved into the world of Gas Gas in 2010 myself. There will be someone here who knows what you need to know though.