Arrow- that's an excellent question. Perhaps someone more familiar with the technology involved can give a reasonable answer to that question. I wish I could help you but that is somewhat beyond my technological expertise. Anyone out there?
IMHO, that's kind of like compairing Ebay to the Home Shoppers Club, one is static, the other is a live broadcast, that's just part of my opinion. The cost of both, I imagine, depends on what you want to include.