"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
They discover some "secret tweaks" too. El snippo:
"The hotshoe protection clip now comes with the camera – it's the little things – and external flash syncs at 1/250th sec. The inbuilt flash has a -3 to +1EV range, which is a nice touch. For the clatter-conscious, there’s a quiet shutter operation mode, which takes the edge off the taking noise. There