Work-wise, and if using as a stand-alone product, I personally get a much greater effect from p79 than TAF.
Using p79 alone gave me a higher level of concentration than using TAF alone. I had used two sprays of TAF previously with some effect, although fairly subtle. I still believe that in order to get a stronger result with TAF I would need three or four sprays.
I only used one spray of the p79, but it gave a stronger more result when used as a stand alone product as the TAF did. It also seems to be where the auditory effects come from, as the background ringing and humming in my ears was back. Additionally, I found my throat a bit dry - I did notice this when I used p79 and TAF together, but thought it was “just one of those things” but I got that back quite quickly after using the p79.
So if I was just using one for a work and getting work done setting I would tend to go for the p79.
However, neither the two sprays of TAF or the one spray of P79 gave me anything like the strong results I attained with one spray of each used as a mix. That was much more intense - possibly too intense for every day use though.
Very handy for work all round. I will deffo be keeping these two.
All my sprays were from the 12.5 to go bottles 
May