Version of currently running can be found from 1st line of
cat /etc/amnesia/version
Version on usb stick can be determined by mounting squashedfs like so
mkdir /mnt/sfs
chmod 777 /mnt/sfs
mount ./live/filesystem.squashfs /mnt/sfs -t squashfs -o loop
cat /mnt/sfs/etc/amnesia/version
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