Both Aardvark and Nuke Anything are super cool tools, and I stole a lot of ideas from them while creating PrintWhatYouLike. But PrintWhatYouLike also adds a whole bunch of new stuff no other service offers. Here are a few of the new features:

* pwyl is a webapp so you don't need to customize or install anything and you aren't tied to any particular browser

* merge pages together - you can combine multiple pages together into one page, and print them as one document. Your changes from the first page are automatically applied to any additional pages.

* pwyl is easy to use - there is a full toolbar, and you can see what you have selected. With Aardvark you have to memorize keyboard commands

* extra features like change text size, font, remove images.

Also some similarities with the Nuke Anything extension.

+1 for Aardvark.