What are the differences between Mini6410A.iso and Mini6410B.iso

I found these two mini6410 DVD images on ftp.friendlyarm.net, but there are
no details of the two. Are there mini6410A and B version? My mini6410
doesn't have A or B.

On A is the software stuff and on B are the images (Linux, Android...)

@Andreas Watterott

Thank you.