Jesus , people get angry very quick here ! :-)
There is a difference in sharpness with these camera's , one can see it at 200´% magnification in PS . Is it worth the extra price ? I think it depends on your needs .I hope the difference will be more relevant in large printing.
The only thing witch I find very disliking/desgusting is Nikon charging 300 euro's more for it ! ( and the NX2 programme I am not interested in at all )
I nearly only do flower/roses photography . I started with a Canon 40D + 100mm and later I switched to Nikon D90 + 105mm . The things I tried to achieve suddenly appeared . At DxO I found out why !!!!http://www.flickr.com/photos/24426799@N06/show/