Apparently for the human eye two text documents may be identical, but of course, the human eye is not infallible and to make sure it is better to have a tool like SyncFolder.
The function of SyncFolder is to thoroughly and thoroughly compare two files with each other, that is, synchronize the information between them. If at any time one of them changed, that minimal change in the other synchronized file would be updated. It is not only limited to files, but to folders, synchronizing the folders with each other, so that the smallest change (of any of the subfolders or files it contains) is updated in its synchronized reflection.
From the SyncFolder interface you can visualize what are the changes that have occurred in the content of the original file compared to the synchronized destination file, the user being the one who decides if it is a change of importance that must be updated. It allows to process and compare thousands of files looking for differences between them.
You can free download SyncFolder 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.