There is no more detail. There is more sharpening. Very good sharpening, yes, but that is totally doable in LightRoom.
I have run more head to head comparisons of Photo Ninja and ACR than I can count, and in my hands, ACR cannot equal the output from PN no matter how much I manipulate sharpening. PN does show more detail, and it doesn't take much effort to bring it out, contrast is far better, and colors are superior. And yes, the sharpening (deconvolution) is very
good, the best that I have seen in any raw convertor. Also the recently released PN v1.1 has the brand new Noise Ninja 4 that is a huge leap beyond NN 3 and ACR. Not even a contest.
I'm surprised that Photo Ninja doesn't get much love here at LuLa, but this is very much an Adobe-friendly site. I use Adobe products (CS6) all the time, but ACR is no longer the class leader in raw conversions, a distinction it lost quite some time ago.