I perfer Bittorrent because Newsgroups usually release things as so many split files. Its so much easier to download one torrent. Also my ISP limits newsgroup usage. Well they also throttle bittorrent, but there are ways around that.
IMO, Newgroups are the way to go if you have unlimited access and don't mind so many split files.
Nightshiver:
Most ISPs have their own newsgroup server
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