Pg (propylene glycol) is considered a better flavor carrier than Vg (vegetable glycerin), and is also somewhat responsible for throat hit. Not a great vapor producer.
Vg is considered a much better vapor producer. Although not generally considered a great flavor carrier, I believe it just needs to steep longer than higher pg mixes. Usually much thicker in viscosity than pg.
I once ordered my favorite flavor in both a 50/50 pg/vg and 100% vg just to see if I could tell a difference. I noticed no difference in flavor between the two, but slightly better vapor production with the 100% vg mix.
Most of my flavors are ordered a 50/50 or 40/60 pg/vg. My
