guess u have read most of the review of RX1-R and notice the same comment about the difference.
Sony RX1R
"given that the Rx1 and Rx1N are identical except for the AA filter, is there a difference in sharpness between the two, and is moire a real-world issue?
The answer to the first question is – yes. There is a difference. The Rx1N is sharper. But as with the Nikon 800e vs the 800, the difference is very small. In fact, my experience is that only in direct on-screen side-by-side comparisons at 100% magnification is that difference really noticeable. Also, once an image has been properly sharpened with an experienced eye, that difference become de minimis. I should mention though that when sharpening, the amount of sharpening required is noticeably less with the Rx1N, so this is both a subjective and an objective observation."
i'm just using the lightroom default sharpening and already find it sharp enuff. so its up to u if the price diff. is worth it or not.