PS: what one you use can depend a little on what plants you are growing.
Some plants have specific mycrobs they need...so I used the produce with as many variates of microbs as I could get (because I ws planting shrubs and trees and otherstuff). If you are planting peas then you would need to get the right legume inoculation (the "Garden" ones usually have ALL the legume microbs for everything...) I still have not found a product with frankiie microbs that Ceanothus sp use...likely a bit to much of a niche market. :P so going to try to inoculate myself from some wild roots...
but also watch what product you buy because I have seen some that also add other things that they call "beneficial" like Bt.
For me that would be doing the TOTAL OPPOSITE of what I want...Bt is a bacterium that will kill lepidoptera and I'm planting these shrubs specifically so I can get lepidoptera laying eggs in my garden and hopefully I can see the adults...