Pro-mix or Pro-Mix BX??

Is there any difference between these 2 products except for the mycorrhizae addition in the BX?? I ask because I cannot fond the BX in my area. But, I can get the mycorrhizae. Thanks.

Well if you can't find it then you get what you can. Add your Mycho. So what department do you work for?! How's the police state monitoring going!?