Is that what we're after? Because Dan is exactly right. Obviously the calibration will appear different on both as well. Makes me nuts when guessing how to set my brightness and contrast for gallery posts. I use PS's comparison, but still it's a guessing game between PC's and Macs. Not to mention the difference between CRT's and LCD monitors. I'm using an Apple Cinema monitor myself.

I dare you, while there is still time, to have a magnificent obsession. --William Danforth