The save game manager built in to the Saturn itself is superior and FAR less annoying than that.
The point is games made with Dezaemon 2 can't be transfered from PC to Sega Saturn without the external FDD which is rare and expensive, unless you know someone who can provide a memory cartridge with the saved game data.
Whats special about this release is the save manager includes +100 fan-made shmups on 1 CD which you can boot on your own Saturn and transfer the games directly to your memory cartridge or FDD. You'll still need a copy of Dezaemon 2 to play them of course.