I don't know, maybe you guys don't have your sets calibrated. I had mine done by Avical, and I see 100% of the same picture via OTA. Same dimensions, exact same picture and brightness levels. I assume you are referring to when there is a 16x9 image being viewed. I switched between the two out of curiousity and noticed that there was no difference at all. (which is why I ultimately decided to get rid of my Samsung box).
I had my grayscale, color temp, geometry, and overscan all checked and calibrated.