Both distributions are equally recommended for beginners with older hardware. I would like to write down here what I like about both distributions in comparison:
Linux Mint XFCE:
- Whisker menu that is more variable than Zorin menu
- automatic maintenance
- System recovery with timeshift can be set during the initial setup
- Software updater (how often updates are searched, which updates, automatic or manual installation)
- Software manager: .deb native packages are shown at first position, no snaps, unverified flatpak packages are hidden by default and there is a search option to choose when an app has multiple formats which packages shall be listed
- Thunar: Open as admimistrator is included as default
- more themes and icon themes than in Zorin
- a little bit faster newer kernel versions
- save terminal output in GUI
- More modern audio server Pipewire instead of PulseAudio
Zorin lite:
- less bloated, it needs a little bit less ressources than LM XFCE
- Zorin upgrader: Upgrade to next higher version is easier than in LM
- friendlier forum
- simpler handling
- Zorin Appearance desktop layouts
I think it's simply a question of personal preference. Linux Mint XFCE introduced me to some useful functions that I would otherwise not have known about as a Linux newbie.
Many of these can also be similarly configured in Zorin, e.g. by removing snaps, installing the xfce4-whisker-menu-plugin, setting custom actions in thunar for opening thunar as administrator, installing your own icons/themes and creating snapshots for recovery with Timeshift.
For me it was a bit easier to have all this by default and because of this I switched to LM XFCE.
What I miss in both is a button to reset xfce4-settings to default one (as e.g. in dconf editor for gnome can be done, but also there is no option to do this
in GUI of normal gnome settings). This is only possible by removing config folder.
And I'd really like a button to make a full system recovery as in Windows and go back to fresh install without timeshift that needs around 10GB GB for one snapshot after fresh install (because I have only little storage space).