Version numbers don't mean anything to anyone other than the developer who wrote it. To make matters more confusing, some developers don't even use a public decimal based version control - some just release as 'build 118' It's super dependent on the project scope and how many people are working on it at a time.
Basically, what I'm saying is, compare two different developers with different version control systems and you will not have any idea of what the final product will be based on that system. It's arbitrary at best.
I personally find a developer's roadmap to be a more accurate portrayal of what the developer in question is wanting to add before the finished product. Even then they aren't always going to hit every bullet point - that's just how game development works. Hope this clears up the confusion.