Opera relies on chromium-ffmpeg for proprietary codecs. Mint and Ubuntu don’t ship chromium-ffmpeg in a way Opera can use. Flatpak, and Snap Opera bundle codecs differently.
Mint is Flatpak-first, Opera is historically .deb-first, Chromium codecs are inconsistent across packaging formats, and Snap bundles codecs in a way Opera can use.
Opera is the closest to Edge in feature sets. -Curated extension store making mv2 safer (and still supporting uBlock Origin), memory management, pop-out video, etc.