As you can see from that chart, Seachem Comprehensive is really "comprehensive" as it contains trace elements that others do not. What that means for plant growth or even if plants care for those extra trace elements, I have no idea.
CSM+B has the greatest amount of the "key" trace elements but lacks those other ones found in Seachem Comprehensive. What that means for plant growth, again, I have no idea. Some swear that the high amounts of copper in CSM+B are deadly to shrimp and have been responsible for shrimp deaths. Others claimed to have dosed CSM+B in tanks with shrimp wihtout any issues. So the jury seems to be out on this issue.
Yamato Green is not referenced at all, but Yamato Green contains Plant Auxins that are supposed to cause rapid plant growth. Yamato swears by this, others say it is nothing but marketing hype.
The whole idea of testing is to see if there is any difference, with all other things being equal and to see what works best.
Will keep people posted.