Comparing two files to try and find differences is something I consider to be an occupational hazard. You can dive into the weeds and run some command line tools, you can pop the files into Word, if you’re doing the comparison on a PC. If you’re trying to do a comparison on a server, you probably don’t have Word.
Diff Checker is an online diff tool that allows you to compare two text files. Any differences in the file are colour-coded so that you can easily spot them.