Which one is better? framework7.bundle.min.js or framework7.min.js

Questions
1

I was using framework version 2~ for always, now I discovered latest version 4~, but when I open package folder, I saw some new files added, bundle.min files,
Should I link and script to framework7.min.css and framework7.min.js or framework7.bundle.min.css and framework7.bundle.min.js?
Which one is better?
What are the differences between these?

2

Use version 3 for now. Version 4 is not yet released and is still in beta

3

What is the latest update of version 3? 3 point what point what (3.?.?)? Is it v3.6.5