VoxeLibre are keen to change and adapt. The game is inspired by MC, but we're going to add ideas in we think are good, whether they're from MC or externally. Likewise, if something new is added into MC we do not like, we may not introduce. We do discuss Game Design in our Matrix / Discord. A feature "being in MC" is not a strong enough reason to justify a change.

Mineclonia are more keen to keep things in line with MC.

Effectively, both projects have different goals and over time will diverge more. It ultimately depends what you value most as to which project will work for you.

We have some info in our readme here: https://git.minetest.land/VoxeLibre/VoxeLibre/src/branch/master/README.md

Some info in an FAQ we're building: https://git.minetest.land/VoxeLibre/VoxeLibre/issues/4585