If you use both Max and Maya, you should know it’s hard to define and compare some overall quality level of 3d software.
If you say something about the work you want to do, and how you perceive the strenghts and weaknesses when comparing Maya and Max, it would be a bit easier to answer.
There are built-in addons that can be activated in any Blender download.
There are addons you need to download and activate separately.
There are special versions of Blender that have certain extra features built-in or left out.
The extra addons are mostly found on the webpages of the developers. The “special versions” of Blender can mostly be found on Graphicall.org.
But for most purposes, you can stick to the official version linked on the main page.