I use a 50/50 mix of Happy Frog/Ocean Forest, straight.
I liked what was in both so I did a side-by-side using the two & couldn't see any difference. But I still liked both, so I use both, at the same time!
I figure the guy's (and I use that in the uni-sexual 'guy's') @ Foxfarm must have tried their soils on MJ. I don't believe I know much more than the 'guy's' developing soils for a living at Foxfarm.
All I can say is "It's working for me".
It's never burnt any of my clones or plants.
Good luck!