1) Cameralabs compared the [shoplink 12883]X100S[/shoplink] with the [shoplink 13071]Nikon A[/shoplink] and we have (again) a clear winner: the X100S with his X-Trans sensor:
“Compared with the COOLPIX A, at the lower ISO settings, the X100S looks a little sharper, but in noise terms there’s little to choose between them with the COOLPIX A’s 100 ISO crop a close match for the X100S’s 200 ISO. At 400 ISO it’s still a pretty close call, but at 800 ISO it looks to me like there’s noticeably more noise in the COOLPIX A crop. At 1600 ISO there’s clearly more texture in the wall, the text panel looks softer and the edge detail is beginning to crumble on the COOLPIX A crop where the X100S is still holding strong.
But read more and see all the ISO-comparison shots here at cameralabs.
No need to tell you which images comes from the X100S X-Trans sensor 😉
2) Mike Kobal posted his video comparison of the [shoplink 12883 ebay]X100S[/shoplink], [shoplink 13071 ebay]NikonA[/shoplink] and [shoplink 13349 ebay]RicohGR[/shoplink] at his website here.

7 Responses
It’s 35mm versus 28mm, that’s not fair man. Things are smaller with a wide-angle. 😛
And the Nikon has a better lens. Noise is noto everything in life.
sharpness is everything then?
I don’t know about that. But neither is bad so it ain’t really relevant to the many much more practical differences to consider. They may both have a fast prime on relatively small apsc body, but other than that they are as different as can be.
And you can’t just go 28mm when you really prefer 35mm because it may or may not get a better score.
Take a look at this test from DxOMark about the Ricoh GR amazing 28mm equiv lens:
http://www.dxomark.com/index.php/Publications/DxOMark-Reviews/Ricoh-GR-Lens-review-High-imaging-performance-at-a-more-accessible-price/Ricoh-GR-Lens-performance
Extremely sharp from f/2.8. The x100s lens begin from f/2 but you see sharp images from f/4 and above!
Ricoh GR costs $797 and the x100s $1299! This is a $500 price difference!
I don’t see any point comparing this two cameras at all…
Noise performance is not the essence of photography!
Okay, that’s great that it’s got a great score on the DxOMark, but compared to what X-camera? The opinion you give about the X100s has to be personal and anecdotal, because DxOMark still can’t wrap their heads around the X-Trans sensor in the X100s and XPro-1 and X-E1….so they have no scores or analysis there on those cameras yet.