JLC's channel guide is maintained by the users. Its stream quality is rather random--some channels have high quality while others are really low. But if you pay attention to the user rating, you would know which channel is better.
Miro does both live streams and RSS (JLC doesn't do RSS). Compare to JLC, Miro has very limited network content, so unless you know where to get your videos, you might not like Miro much. Another down side of Miro is that you will need a lot of hard drive and faster internet connection because it wants to download everything to your computer in TiVo style (get the TV shows into your computer so that you view them later).
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