ExFAT is much more complex and AFAICT it does not have a 2nd copy of all of its data. [2]
Anecdotal evidence is that I personally lost data on ExFAT file systems, but also have had many customers with problems when they figured to use ExFAT for my backup products. If I see ExFAT in a support bundle than -by default- my suggestion for fixing issues is to reformat to a different file system. More often than not, that's the end of the open support case.
Worked one day, then few days later plugged it in and it was all gone.
I kid, this is what I do. I've recently been backing up my family photos/videos to various media and I've been hashing each file and storing a hash file alongside the media to compare to in the future.