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The editions you are referring to are not official Manjaro editions; they are community editions.
Concretely, what this means is that the official Manjaro editions are developed and maintained by the entire Manjaro developer team, whereas the community editions are released and maintained by “the communiity”. In practice, this is usually one of the developers on the main team who decides to release and maintain one of these alternative editions in his or her spare time, and this is the case for each of the community releases ─ e.g. LXDE, LXqt, Awesome, BSPWM, i3, Deepin, Budgie, Cinnamon and MATE.
Next to that, there are also spins. Spins are developed and maintained by certain members of the forum, and their difference from the official and community releases can range from a small difference in theming to significant differences in packaging ─ e.g. not including certain packages by default, and/or including other packages by default, or a different configuration of the default settings, or a different kernel, and so on.
So, the bottom line is that there are three different types of Manjaro…:
- Official Editions
- Community Editions