Any suggestions for M1 optimized file comparison tool? [closed]

A app called FileMerge is included with Apple's Xcode developer tools. It's a GUI app with a command-line variant called opendiff. FileMerge is optimized for M1 Macs. If you install Xcode, you'll find FileMerge at the path shown below and in the screenshot (it's a quick Spotlight search away as well): /Applications/Xcode.app/Contents/Applications/FileMerge.app

FileMerge location