let me know about this comparison algorithm of yours and I'll see if I do anything.
For comparison, you will need two free utilities: WinMerge and 7-zip.
The comparison algorithm is as follows:
1) Prepare two directories for comparison (for example COMP1 and COMP2).
2) Transfer disk images to each directory; it is advisable to give the corresponding disks identical file names.
3) Using 7-zip, select all disk images. Set the command "Unpack in this directory".
4) If there are conflicts between files of the same name, set the “Rename all” command.
5) Open the WinMerge utility, set the COMP1 and COMP2 directories for comparison.
6) In the comparison results window, add the columns “Date on the left”, “Date on the right”, “Size on the left”, “Size on the right” (if these columns do not already exist).
7) Using the "Report" menu, output the comparison results to a file (preferably CSV or HTML).
If your disk images were taken correctly, then some (or all) of the disk images may be identical.
Note: Sometimes differences in files mean that the file is damaged (for example, the floppy disk was poorly read).
Ideally, after a general comparison, you need to carry out a second comparison, in which each disk is extracted into a separate directory (for this, obviously, the corresponding disks must have the same names). 7-zip also has a command for extracting each file into a separate directory.
7-zip can only work with RAW images.
