So, for Tonden_Ockay's purposes, it sounds like 2.3 would be safer than 2.3c?
The problem the OP wants to avoid is using models and textures that PWs don't have. On the basis of two comments, that suggests 2.3 rather than 2.4. Presumably, 2.3 original has less than 2.3c. Even if 2.3c contains bug fixes, they will still work if the prefab is 2.3 and the PW is 2.3c.
On future releases, we could really use release notes, to be confident about what has changed! I don't know what possessed the old CEP team to introduce an updater, but I sincerely hope it never happens again, as we could do without this confusion!
Players can ignore this discussion, and go for 2.4 until 2.6 is released.