So on the menu system, I almost never go into the actual menus on the Sony. Once I've set it up, 98% of the time I just use the quick menu button that allows me to change focus type and zone, ISO, and things like that. The core menus are frustrating... not sure what drunk friday they did them on. But I haven't really found them to be an issue in real world conditions.
The sony AF system is super sticky. Get in locked on to a subject and it just tracks he heck out of it. The only down side is if it grabs the wrong subject, you will get tons of lovely shots of that subject. I say this from a sports perspective. I've had a few 20 + frame runs of the wrong subject being tracked. On the other hand two weeks ago I caught a series where in football the play came right at me, and it tracked from about 30 yards out right to the point where I became part of the play, with great shots of cleats and feet as they ran over me.
Best part, camera went flying, ending about 8 feet away. I scrambled to get to my camera, picked it up, and it was ready to fire again. The hit was hard enough I was sore the next morning. But while the camera may have lost one of its 7 lives, its still reliably clicking away. Surprised me. Its been a dang long time since I was sore on a Sunday morning.... but kind of fun too...
If high speed focus tracking is a priority, the Sony is better. On the other hand if you are looking at just general photography, I'm sure the Canon is well up to the job.
EDIT: I also shoot a speed booster on the Sony - love the extra stop of light.
