Caos Linux versions

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http://www.linuxquestions.org – Distrowatch lists 'CaosLinux 2' as having kernel No mention there of Caos Linux 2.1a, nor has Google search turned up anything other than download link. I need to know does Caos Linux 2.1a have the same kernel? Also, any major differences from the Caos Linux 2 of Distrowatch? Thanks. (HowTos)