Why? That's a fair question. It may not be clear from reading Izotope's description, but it becomes clear when you use them in a larger multitrack project. You can put Alloy on each track of a mix if you want to. Ozone will overload your CPU after being loaded on just a few tracks. If you only use Ozone, you can apply it destructively a track at a time but it's nice to be able to adjust sounds on the fly, non destructively, during playback of a full mix. Alloy is for mixing. Ozone is for mastering.


BIAB 2025 Win Audiophile. Software: Studio One 7 Pro, Swam horns, Acoustica-7, Notion 6, Song Master Pro, Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus 192 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.