I would agree.  We brew several microbial products.  Use lots of food sources like humic and molasses-based cocktails.  

Its not "biological product X" vs "synthetic Fert" comparison.

I would suggest using biology tools as a complement your management practice.  The lone wolf use case for a conventional farmer would use an Organic/Microbial product as replacement for fungicide.   Cheaper too.

Too many variables to compare - really needs to align to your long term goals, not this year's yield goal.