If you need to compare settings between runs/configs of a project, you can use this command to dump all console variables, their current value, and where they were set:
DumpCVars -csv="C:\some\absolute\path\cvars.csv"
If you don't pass a full path, like DumpCVars -csv="cvars.csv" then the file will end up in the same folder as the binaries you were running from, e.g. \Binaries\Win64 for Windows platform.
It dumps them in the format NAME,VALUE,SETBY, and they are alphabetically sorted so you should be able to easily diff them using any text diffing tool.