file compare problem with windows file history

[watamu]

Sorry if this has been asked before. Did search but nothing clear. So I want to use winmerge to compare two sets of folders and files. One is the data on the HDD of my win 10 PC. The second is the data held on an external HDD I use for backups using Win 10's File History capability. Unfortunately, File History adds a time stamp to every file as in:

sa150.pdf
sa150 (2021_03_15 18_18_38 UTC).pdf

Thus every file is shown as different in that it only appears in the left or right hand column.

I understand the reasoning and I know that the restore function will remove the time stamp when restoring - that's OK. But what I would like to do is compare the content only, ignoring the different file names. Is that possible given that winmerge sees them as two different files?

TIA of any help you can give

EDIT: Please ignore this request. I have decided to abandon using File History and try a third-party backup program. I have been exploring Winmerge because there are discrepancies in File History with many examples of it not backing up a significant number of files for reasons I don't understand - for example maybe 20-30 music tracks in a folder of 2000 similar examples.

Cannot see a way of deleting this request altogether - perhaps an admin would oblige.