You don't need a mycorrhizae fungi or any beneficial bacteria in your soil to grow great pot, but like many things its a tool used to make growing easier and faster. I recommend caps bennies simply because the sheer numbers are there as far as cost and amount of spores. Next would be
great white it is the commercial standard. I have never used gh line but it should get the job done. I would say if it aint broken why fix it, if you had great results with
great white master it before you move on to another product. If cost is an issue maybe you could try taking
great white and mixing it in with caps tea recipe to make the fungi and bacteria replicate increasing the amount of product you can use in a grow. Just food for thought, hope it helps you.