X100S vs X100 autofocus comparison, youtube video
Found this video on youtube. Was surprised by the results.
Here's what I saw in the video:
X100S was slightly faster in normal light
X100 was terrible in macro mode, did not lock focus often
in low light at mid range - X100S and X100 traded turns being faster
btw I have an XE1 with kit zoom and loving it. So much better than NEX 6 which felt like a toy. Thinking about getting an X100S.