Welcome to Linux and the forums. The general rule of the thumb is that Flathub and Snap packages are the most up-to date and the PPA packages (here titled as Zorin OS) are more outdated.
I can suggest you to only use PPAs and Flathub.
The downside of Flathub is that applications can get a bit big because of their dependencies.
If you want to know more about PPAs vs Snap vs Flatpak, check out this forum thread: PPA vs Snap vs Flatpak