This is a personal taste, but I feel like the instructions for the installation options are confusing.
The options are:
Only CP (Community Patch). This allows to play civ bnw with very minimal changes, only a much better AI and a few bug fixes. It's used as the base game for many other mods.
Vox Populi. The full mod, with all the new features. It is made of five big mods, including CP.
Vox Populi (EUI version). The full mod now implementing a modified version of this popular user interface mod.
Vox Populi (43 civs). Play all civs together if you want, sadly without city states.