I got some VG redcow in my recent order. I've vaped the PG redcow cartos recently as well. The VG definitely produces WAY more vapor, but the taste isn't quite the same. The VG ones don't have the 'bubbly' taste I associate with the cola flavors. The VG has NO TH at all on the redcow flavor, but the PG has a decent TH. I don't like TH, and was really looking forward to the VG cartos, but after comparing the same flavor back to back, I'm kinda disappointed thus far.
Also, the VG ones don't last very long. The PG cartos last me 2 whole days each, and the first VG carto I opened lasted me 1 day. I think my 2nd and 3rd carto were bum cartos because they each only lasted about 15 minutes before getting the completely burned taste. I opened the 4th one this morning, so after an hour it's still ok so far.
And also, the last couple days I've been breaking out all over my face with acne. I haven't had acne like this since I was a teenager. I didn't think it might have been related to vaping VG for 3 days, but after reading Keyzygirl's above post, it might be something to look into.
I don't have the tickle in the throat from PG anymore, but yet VG doesn't seem to quite be the answer. I hope this is just an adjustment period to switching to VG, and hope that maybe redcow is just a bad comparison flavor.