I really don't think it compares to the 5D either. They are vastly different.
It's more of a 20D competitor than anything else. It's DX cropped camera. The main difference are 2 more Mpixels, ~$400 higher cost, a couple of nice features like RGB histogram, and the yet to be tested noise and image sharpness.
The 5D cost 2x as much, almost entirely due to the FF sensor.
I think it's now almost certain the Canon 20D replacement will have 10 - 12 Mpixel. I'm not happy to see the Megapixel race continue. I'd rather see them trade off sensor resolution for better noise and dynamic range.