I feel like the word "version" means completely separate things to a programmer talking about (d)vcs and to a designer talking about mockups. To a programmer, version control is more likely to mean revisions of the same file as it evolves and is changed. To a designer, a version is a distinct mockup that represents a new look.
(Sure, a programmer may rewrite something, and a designer will tweak something. But, even then. Different words are used to describe what took place.)