Here's some info on PG/VG -
The more PG in the mix will make the liquid thinner, and will produce more throat hit and less vapor.
The more VG in the base mix will make the liquid thicker, throat hit will be less and the vapor produced will be much greater.
REDUCED PG : Flavoring is PG based, if nicotine is selected it is added as VG based, and the remainder is filled with VG
100% PG : 100% PG, there is no VG in the bottle. This will produce little to NO vapor, and LOTS of throat hit
100 %VG : 100% VG, there is no PG in the bottle. This will produce little to NO throat hit, and LOTS of vapor
80%PG / 20%VG : This will produce a small vapor cloud , and LOTS of throat hit
70%PG / 30%VG : This will produce a small to moderate vapor cloud , and above-moderate throat hit
60%PG / 40%VG: This will produce a moderate vapor cloud , and moderate throat hit
BEST > 50%PG / 50%VG: This will produce a moderate vapor cloud , and moderate throat hit
40%PG / 60%VG : This will produce a moderate vapor cloud , and moderate throat hit
Throat hit also depends on how many milligrams of nicotine you select and what kind of device you are using it with (higher voltage, lower resistances etc).
Adding Menthol also increases throat hit.
https://www.ecblendflavors.com/throat-hit-vapor-and-consistancy/