That's the common perception. Many use u43 for the small size. Of course the downside is that the u43 sensor is a fraction of the size of FF. Bigger is better...right? Well... I don't know. What are we trying to achieve with a larger sensor? Better IQ when printing large? Just recently, I had my office decorated. The decorator interviewed me extensively... my interests, likes, hobbies etc. And I shared my flickr account with her. And she chose a bunch of pictures to frame. The frames you are seeing are pictures I took with E-P1 and 14-42mm I kit lens some years ago. And I'm not sure that a FF picture taken with an L lens would make much difference. How often do we print the pictures we take anyways? I think us photogs paralyze ourselves with technical specifications of our gear so much, we are more interested in buying new equipment to take better pictures that will just be filed away in an external HD instead of improving our photo skills. Am I right? Oh... office picture taken with my outdated Samsung Note III.