There are different cable companies. It is not uncommon for a Cable company to to have a lock on a neighborhood, area, or building, so you might be limited to a particular company only depending where you live.
The lineups are usually similar, but I think DirectTV may have better choices for programming in English. Check these sites for more info and lineups:
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Multicanal
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Cablevision
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Telecentro
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DirecTV
For English programming, we don't bother with our cable service. We use a
Slingbox to watch our TV back in US (via the Internet), and use an
AppleTV to rent movies and buy TV shows. Both connected to our HDTV.