... Just curious - could you kindly explain in what way tastewise they differe, please
I myself can taste differences in the same tank of unflavored vg. The sweetness level changes and at times the sweetness changes to a kinda corn starchy sweetness taste. Also at times it for some puffs come to be really "fatty" and reminicent of fat cooking oil, but that is rare and goes away as quickly as it comes... All these charasterics span over all the vg brands i've tried, allthough it's only been, I believe, 4 different vendors i've currently tried. It's probably in my case, because I use water in the vg, and so based on the amount of water currently available, then the charasterics can obviously change. However, come to think about it, then it was the same back when I used pre-mixed bases 50/50 pg/vg without water, though, but again, that could be because the pg evaporates faster than the vg, and so the same thing applies as for the "water thing"...
Please don't take this as a mistrust to your palette, and I do know from reading different posts of yours that you are a "good taster" or how to put it
As I explained, i'm just generally curious about the differences between different brands and sources of vg, as i'm a vg unflavored vapor myself, and so different nics and possible different vg's, is what I use to tweak the flavor profile, the same as the flavor-using vapors do with there flavors...