The Samsung actually isn't OLED. It's "Q" (good marketing trick)LED. Great colors and vibrancy. They do lose contrast when viewed from the sides.

IMO...the Sony LED looks natural and the colors are more true where the Samsung "pops" more and is more vibrant. Motion processing is pretty close on both. UPDATE: I forgot to mention the Sony OLED in this comparison. It's the best TV I've seen and blows away anything out there.