Sorry for necroposting, but Notepad++ can suit your needs of comparing two .ini files and merging them. It can highlight the same lines between files and spots where values are different. Best of all, it is free, as are the plugins that allow it to be a valid programming tool that has the ease of a simple text editor. Snag it, take it for a spin, kick the tires, I am sure it will help those looking to just merge ini's or check two (or potentially more) for comparability. The compare-plugin is found (be sure to get the version matching your notepad++) @ https://github.com/pnedev/compare-plugin/releases/tag/v2.0.0