100% PG: Very strong
throat hit, with clean flavors and not much vapor production.
80/20 (PG/VG): Still very little vapor production, and a moderately strong throat hit.
70/30 (PG/VG): A little more vapor, a little less throat hit.
60/40 (PG/VG): Decent vapor with a noticeable, but not to overwhelming throat hit.
50/50 (PG/VG): An even mix, with quality vapor clouds and a soft throat hit.
40/60 (PG/VG): Noticeably larger vapor clouds and a reduce throat hit.
30/70 (PG/VG): Good vapor production and a minimal throat hit.
20/80 (PG/VG): Excellent vapor production and a very small throat hit.
100% VG: Very little throat hit, with noticeably sweet flavor undertones and massive vapor production.
The Ultimate Breakdown of PG vs VG E Juices