Regarding sore throats, there is definitely a difference in throat soreness depending on which vaping device you are using. I settled on the Joyetech 510 cartomizers very early on, and I've stayed with them because I think they deliver the most satisfying flavor and throat sensations, with virtually no sore throat. This is just my opinion based on my experience. However, when I use the Joyetech tank systems, my wife and I both noticed a distinct difference in that those systems burn our throats. I've not been able to figure out why that is the case. I still mostly use the cartomizers, despite their well-known drawbacks (the awful taste they deliver when the wick is burned up, or the absolutely horrible taste when they run dry and the poly filler burns!! Yuck!!) Anyway, I still like the cartomizers overall, and I still get a burning sensation in my throat when I fire up one of the tank systems. I don't know if it's the polyvinyl tank that's creating the burning, but I suspect it is. I also notice the liquid turns dark pretty quickly in the tank systems, and I don't know the explanation for that either.
Anyway, the burning sore throat has more possible causes than just whether it's PG or VG juice. It could also be the vaping device.
Anyway, the burning sore throat has more possible causes than just whether it's PG or VG juice. It could also be the vaping device.