Comparando formatos de compactação no linux

neo@fernando:~/Desktop/pacotes$ ll
total 99M
-rw-r–r– 1 neo neo 41M 2010-01-12 15:54 logs.ar
-rw-r–r– 1 neo neo 3,2M 2010-01-12 15:54 logs.cbz
-rw-r–r– 1 neo neo 3,2M 2010-01-12 15:54 logs.jar
-rw-r–r– 1 neo neo 41M 2010-01-12 15:55 logs.tar
-rw-r–r– 1 neo neo 2,0M 2010-01-12 15:56 logs.tar.bz2
-rw-r–r– 1 neo neo 3,2M 2010-01-12 15:53 logs.tar.gz
-rw-r–r– 1 neo neo 1,7M 2010-01-12 16:00 logs.tar.lzma
-rw-r–r– 1 neo neo 3,2M 2010-01-12 16:00 logs.zip