I'm not an expert in this area by any means, but there is definately more to it than just the media. The main difference, i suspect, is probably in the area of the layer-2 transport packets.
In any event, from a subscriber, the most important thing for you is what it costs and what the service level agreement is between you and the provider.
To get you a technical answer about the difference, I'd have to do some reading on my own.
JorgeM
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Question Answered as of 1 Month Ago by
JorgeM