Mushroom Compost Vs Organic Compost

I'm in need of some advice / Help,

I'm just thinking about doing another grow, I'm thinking Barneys Farm Blue Cheese,
This is my 2nd grow first was Auto AK 47, in organic compost, I was happy with the outcome as it was my first grow, and didn't really use any nutrients, Yield could have been bigger, (but I think that will always be the case)

Anyway for my 2nd grow I'm going to use the ATami Bloombastic, starter kit,
I've been looking around and have noticed something called Mushroom compost,
I've got a few questions,
1) Has anyone heard of Mushroom compost
2) Has anyone grown with, What were the results
3) What would be the better option normal Organic, or Mushroom compost

I'm hoping someone can enlighten me,

Any help is appreciated

Not that great to be honest. Most nutrients have already been used in it. I only use it for outdoor grows cause the soil is made up of alot of clay, if I break up the clay and add both organic compost and mushroom compost it makes a pretty nice soil. Add some more stuff like alfalfa meal, dolomite lime, and some perlite, and you got some decent soil.