X20 Or X100S?

ryder78 wrote:

Thanks for all thoughts. Certainly useful. Most sentiments have echoed my thoughts earlier. Yes, it certainly makes no sense to introduce a larger APS-C sensor in the X20 in a marketing viewpoint even though it may be technically possible.

A good suggestion to consider both X20 and X100S together. Similarly I think both are fine cameras, and there may not be any tangible differences in image quality in good light. In low light, the X100S may have a an edge. Whether it's a slight edge(improvement) or a significant one, that will be dependent on the expectations of the user I guess.