CBS has the edge IMHO because not all Fox stations broadcast in HD, including the one here in Bakersfield. It's getting to be a pain to watch the baseball playoffs, and now the BCS games in standard definition. The Fox station here operates as a "sublet", with its studios and offices as part of the CBS station here. The CBS station broadcasts in HD, but can't seem to get around to making the Fox station HD because they don't want to be bothered with it right now.
Like right now, I have to watch the NFC game in standard def. My antenna cannot pick up the Fox station in Tulare, too far away.
When I have seen Fox on NFL Sunday Ticket, I don't notice that much of a difference. I do commend Fox for broadcasting more games in HD than CBS does, but Fox needs to get on the stick and require all its stations to carry broadcasting in HD.
Off the subject, Bakersfield is a city where DirecTV does not carry the HD on their satellite, you have to pick them up over the air. I missed part of today's Patriots game because of over the air problems with my antenna. DirecTV is supposed to launch some new birds this spring, when they do I do hope this city gets its HD content on the satellite.
Bob G