On paper both the 200 and 350 can climb to 350. In reality the 200 is out of steam in the high twenty's while you can realistically get FL310 out of a 350. The fuel flow on the 350 up there is about the same as a 200 at FL26/280 and a bit faster. The 350 is the plane to have. Check the payload on a 200 with full fuel, pretty weak. The 350 you can fill it up and still carry loads of stuff. Nicer handling aircraft as well.