MW2 is a shit game IMO, but on topic about graphics. Neither really looks better than the other, and from what I saw there wasn't a real good comparison of graphics for the MW2 portion. I only watched half of the vid. For the most part they looked virtually the same. I mean I haven't played BF:BC2 on my ps3, but I did play MW2 and honestly was not impressed with the graphics at all... I mean some of the HD was good and clean looking, but the buildings and scenery look very dry and dull for the most part. I still prefer WAW maps, scenerey, and artistry to MW2's equivalents. But the people and guns look better on MW2. Though it wasn't a great improvement.
The cinematics on BFBC2 look better than those of MW2 in terms of graphics and details. The game play and sceneries I saw looked about the same, but I think BFBC2 may be a notch above in this regard. I'd really have to play it on my system to tell though.