XFCE has great support with a community forum devoted to the D.E. across multiple distros. Toz is a legend:
https://forum.xfce.org/
It also has very easy to read and follow documentation in a wiki format:
https://wiki.xfce.org/start
XFCE is a fully fledged desktop, unlike Gnome. Gnome relies on independently produced "extensions" that Gnome detests and does not support - and may likely inhibit altogether, just as Gnome already has done with indie themes and theming.
For user experience, I prefer XFCE because it is a Full Desktop and because it allows greater user customization. It includes a Full Window Management system - which Gnome lacks.
Gnome is grossly unpolished. Widgets take on different sizes and proportions due to the lack of a Window Manager. Widget portions also can overlap and bleed into eachother. This is why only Flat or monochromatic themes work best on Gnome.
Gnome users can point out the benefits and perks of Gnome better than I can, due to my own biases.
However, Gnome is more integrated, Can be beatiful with the right themes and the extensions, while a con in one area, can be a huge pro (as it is now) by offering a large number of independent developed tools and functions that are very useful.
Swap performs the same way, regardless of desktop environment.