Well if it’s in a chem set it must be more concentrated. I’m guessing the only difference is that the EST here is diluted with perfumers alcohol. I can only imagine that all EST is the same, just different brand, and precision in the lab.
I’m not so sure TAC alone does anything BUT MEO-EST is the intensifier. I think there is TAC in MX 135. I tend to use that with MEO-EST when I’m going for the BAM effect. Though I am not so sure it has been as effective.