You have to remember that the Durons have less cache. The 1.2 will have a faster fsb, but the lack of cache will slow it down a lot. You may be able to oc to a higher speed, but performance might be worse. I have one, but it's not oc'd, I save that for my XP1600+@1700+. Not a great oc, but it is stable and does what I need it to do.
If my info is wrong, feel free to correct