I know this has been asked but I never paid attention to the answers. 
I got a free zero nic sample from a supplier. It was wonderful. I then ordered it with a 24mg nicotine level (2.4%) and it didn't taste quite the same. Tried again with 18mg nic levels and still, not the same as that zero nicotine sampler. This is a reputable supplier where I currently get my ADV from and it's pretty consistent with each order. All my juices steep for 3-4 weeks.
Damndest thing.
I got a free zero nic sample from a supplier. It was wonderful. I then ordered it with a 24mg nicotine level (2.4%) and it didn't taste quite the same. Tried again with 18mg nic levels and still, not the same as that zero nicotine sampler. This is a reputable supplier where I currently get my ADV from and it's pretty consistent with each order. All my juices steep for 3-4 weeks.
Damndest thing.