If you are going to play a Blood Angels or Blood Angels successor chapter, use Codex Blood Angels.
There are differences between them but you should follow what is written in the codex you are using on that day. Don't compare the SM and the BA codices are they are different. I know it seems a bit strange that Blood Angels (who are basically red space marines) should have different rules from regular space marines regarding equipment but thats just how they have been written (for reasons beyond me).
The Blood Angels PDF from WD is now outdated and the book version takes precedence.
Hope this helps