I personally think it is better because of the more accurate reticle. The one in CoD4 seemed to not really have a true "point" in which to kill someone. You kinda just had to aim for their body and lead them very good. The one in CoD4 seemed like a true acog like in real life but the the one in Mw2 is much more accurate and precise. Kind of like the holographic sight and red dot sight deal.