LOTR BluRay/DVD question

I got suckered into buying this three times. I have the original (theatrical) DVDs, the Extended Edition DVDs, & the Extended Edition BluRay box set.

For archive purposes, the BluRay set has all the bonus features of the other 2 sets, right?

As far as I know Phone Post 3.0

Thanks. I don't think I can make it through all 8 million hours in a row & remember everything.