Did some testing by compressing 348 ogg (vorbis) files.
Code:
Original files size 44,053,199 bytes
fast paq8 v6 43,377,412 option -8
paq8pxd v69 42,234,615 option -s9
oggre 41,387,188
Noticed that oggre compressed large ogg (vorbis) files fairly well, but conversely made worse compression on smaller files!
Overall oggre is the best for this test, but only just. paq8pxd_v69 is close behind.
And overall, oggre reduced files size by "only" 6%!! Not really a good result!
Didn't test using paq8px v183fix1 because it would take a long time to compress these 348 files, and compression result most likely would only be slightly better than paq8pxd v69 result.