Yes I understood what you meant. The places where I asked what they used for their own seedlings all swore they were using Miracle Gro (ugh). They might not have been telling the truth since they were selling MG but what can you do when that's what they say.
I was told by someone (not a commercial person) about Fafard but never found a source for it. I've never heard of the other one you mentioned.
MollyD