What is the difference between "Box UV" and "Per-face UV"

[stuck hatch]

And which one is recommended to use?
(Blockbench, Bedrock entity, thanks!)

[frigid shard]

!faq box-uv

[charred stag]

Box UV is a UV mapping mode in which all UV sides of a cube are stuck together (similar to a cut up dice) and their size depends on the dimensions of the cube. In comparison to per-face UV-mapping, individual faces cannot be mapped separately, and the size of the UV map cannot be changed individually.
Box UV is currently mandatory in the Modded Entity format and optional in all other formats.

You can change the UV Mode in the project settings (File > Project...).
https://cdn.discordapp.com/attachments/249490255063941130/854783664780083230/unknown.png

[frigid shard]

and per face uv is well, per face. each face of a cube has a uv and can be placed wherever on the texture instead if being like box uv (it can be any pattern, shape, size)

its just up to personal preference in most cases