I have not yet seen any comparisons between these two cameras. I know, they're both brand new on the market and there hasn't been much time to do a real in-depth analysis. So without having them in my hands, here are just a small sampling of the differences I've seen online that might tip the scales toward one or the other:
Sony: about two grand
Canon: about two grand
Canon: 2 XLR's
Sony: single stereo 1/8" jack
Canon: Nope, but there's a mount + individual audio controls
Sony: Yup, that awesome 4-pod thingy
Canon: "35mm equivalent of" 30.4mm - 304mm
Still photo capability...
Sony: JPG, 14.6 megapixel
Anybody been able to test both of these side-by-side yet?