Not to start flame war or anything, but my Surround takes better pics in general compared to when I had the Focus. The Focus does have the advantage of more camera settings, but unfortunately it meant I had fiddle around with it more. Although, figuring out the correct settings can/will produce better pics than the Surround.
I think the difference in cameras are not in hardware, but software implementations. MS left it up to the manufactures, as seen when comparing the available settings between the Focus and Surround.