For the mcd bioses :

the f5f60f03501908962446ee02fc27d98694dd157d one is correct, dumped by me and other people, I just have to update the information on my website.
the 523b3125fb0ac094e16aa072bc6ccdca22e520e5 is a bad dump of the f5f60f03501908962446ee02fc27d98694dd157d, it has shaddowed vectors. It happened when dumping with the megacd active.

The newer x-eye dump is indeed correct, I haven't check myself but you can totally trust TmEE on that.
He dumped the wondermega one too.