The comparison wasn't side by side but the picture on the Samsung was clearly sharper, more detailed and a lot more vibrant. I
Two things, unless they were side by side on the same signal, it's hard to really tell. Plus, traditionally B&O sets haven't fared well in side by side demos because Beovisions are calibrated properly to be as film like as possible whereas most mass market sets are set to retina searing levels. Makes then pop when on the floor surrounded by other sets, makes them not a great set to watch a movie on. If you look at another brand get the remote and play with settings, odds are it'll be on Vivid or some such not Cinema.
FWIW I don't have a Beovision, but a Panasonic VT series 65 inch set that is just outstanding. Much cheaper than a Beovision 12 but not better really, about the same as they share glass. I'd probably give the nod to the Beovision 12 because of superior video processing, but it's incredibly close.
My video and audio systems are separate, B&O audio, other stuff for video.