
The ice on the lake has lots of wonderful structure that you can see in this 100% crop from the Lightroom image:

Now compare this with a 100% crop from an Aperture export of the same image:

What is going on? I see anomalously colored areas, little mazes and a generally muddy image. This is not salvageable with any moiré reduction, sharpening or edge sharpening in Aperture. It just becomes more messy. To illustrate further, here is a 300% zoom of the image in Lightroom compared with Aperture:
Lightroom conversion:

You see all the detail and bumps in the ice very well.
Aperture conversion:

Ugh! I admit you have to be a pixel peeper for this, but that is terrible. Of course on a webimage, you will never see it as illustrated by the Aperture image below (compare to the first image on top of this post):

Looks fine at this scale of course. However, you will certainly see this in larger prints (i.e. 8x12 and larger). In all this I haven't even mentioned that Nikon's software conversion of the image is even slightly better than Lightroom/ACR! Also, note that I looked at only one image. I see it in other images too though also from different cameras, but your style of photography or your specific camera might make this less of an issue.
Of course, when I edit this picture further, I would probably brighten the foreground a little and crop it differently. Here is the result starting from the Lightroom image above.:
