What BetterAudio adds to macOS sound settings: per-app volume and EQ, routing each app to its own output, device priority, DDC monitor volume and more.
macOS gives you one volume, one output and a menu to switch devices. BetterAudio keeps that and adds a volume, EQ and output for each app, device priority, hardware volume for external monitors and on-device dictation.
Pick macOS Sound Settings if: One volume for everything is enough and you rarely change outputs.
Pick BetterAudio if: You want different levels or outputs for different apps, or volume keys that work on your monitor speakers.