I may get both soils and do a side by side comparison with same genetics. Now I just need to decide which Mephisto strain to get...LOL.
I have found that interpreting this kind of side-by-side cook-off comparison can be problematic given the natural phenotype variability for any given strain. As an example, I grew four AK-49 plants (my own organic soil recipe, PlatinumLED lights) in one grow with identical conditions and same soil batch. . I even rotated the pots every few days to ensure that the overall light regime was the same for each.
The result: 4 very similar plants? NO WAY. Where were 2 distinct phenotypes, a leggy one with narrowish leaves (I nicknamed it "
spear"), and a squat phenotype, much denser in vegetation with thicker, more rounded leaves, which I nicknamed "
cabbage". (The structural differences in the phenotypes were apparent by the time the plants were 10 cm tall.) These all had the same identical light and soil regime.
Had I conducted the experiment proposed here (supposedly) identical genetics but with two diff. soils (or also different lights, if you should want) I could have drawn some pretty incorrect conclusions- based on natural genetics- when I may have thought I was testing soils.
I think that to more rigorously test differences in soil performances, one would be well advised to grow three (at least two) identically strained plants in each soil type under identical lighting conditions. I can't do that myself, given room constraints, but it sure sounds fun, and lots of good weed!
Maybe AK-49 is particularly known to be strongly dimorphic, there are probably more "stable" strains better suited to this purpose.
Oh yeah, the AK-49 was the bomb. I got a yield of about 25g per plant for the "spears" (little more zippy) and about 40g per "cabbage". One thing all the plants had in common was an intense- i mean really intense odor, both in growth and in the bud jar. Great taste and serious buzz.