"Comparing" is a tad harch, its more like an apples to oranges and Klingons to Jedi thing:
 
"This article compares all the affordable weather-sealed DSLR cameras in production. These DSLRs are the Canon EOS 7D, the Nikon D300S, the Olympus E-3, the Pentax K-7, the Pentax K20D and the Pentax K200D. The definition of weather-sealed varies between models but does not mean waterproof, so all DSLRs

The extensiveness of this review can only be matched by those of Dpreview. But these guys also add a nice, comprehensive video section too. I'd say its One of the top 5 reviews of the 7D:
"The Canon 7D essentially functions under automatic control in every mode except Manual mode. In all the other modes shutter speed, aperture, and

Cnet is known for these mini reviews they cook up in 5 minutes, but this one is actually ok:
"The biggest draw for current Canon users thinking of stepping up from the 50D (or that class of camera) to the 7D is the improved autofocus and better photo quality at higher ISO sensitivities; it's significantly better than the 50D in those respects, and well worth the price differential. Things

If DXO's ratings are to believe the 7D does not hold too well against the Nikon D300s, or even the older Canon 50D, but the differences are small.
Link

 
These releases add support for the new Canon EOS 7D including live view display, timed bulb exposures and the ability to save images to the camera only, camera and computer or computer only. When saving images to both the camera and the computer the same filenames for images can be used for images saved on the computer as for images saved on the camera's memory card.

And it took all of the pounding without a hitch. Ole Jorgen Liodden reports:
"I always use the 7D with the attached battery grip because it gives me a much better grasp of the camera. Some 5D Mark II users who use the battery grip have reported some problems with water leaking between the camera and battery grip. The battery grip for 7D is new and seems tighter and better sealed.

One of the better reviews out there:
"Any of the modes worked well with static subjects, although users should keep in mind when using the auto select or zone methods that all AF points in the selected zone are used to acquire focus and will tend to focus on the nearest subject. For moving subjects I found that AF point expansion worked best