Having done a deep dive into both the 200 and the 220, I would pretty much not care which I got. Both would get the Eric Gore nickisil 225 kit as soon as they fried their stock bore. The 220 has a smaller carb... many people believe this gives worse performance than the bigger carb on the 200. My experience with both bikes suggest this is wrong, the 220 small carb is actually better sized for the bike and will make better power. That being said, the 220 is a *little* harder to jet to be easy to start and run great. And the 220 has less flexibility in pipe selection. And the stock 220 piston seems to be a bit more grenade prone. So the 200 is actually probably a bit better starting point, the 220 is a bit better out of the box, and if faced with buying one or the other I'd buy the one in the best shape.
(Not that anyone asked for my opinion.... :) )