The main difference between nic salts and freebase nicotine is the throat hit that each type of nicotine provides. Whereas freebase nicotine is known for its stronger throat hit at high strengths, nic salts are a lot smoother. Freebase nicotine is alkaline, but the addition of benzoic acid neutralises the pH, making the throat hit of nic salts milder. As well as this, you'll find e-liquids that contain freebase nicotine in a wider range of strengths such as 3mg, 6mg, 12mg, and 18mg, compared to nic salts, which tend to stick to 10mg or 20mg.
Freebase nicotine is the conventional form of nicotine found in cigarettes, whereas nicotine salts are a chemical compound containing nicotine as well as other organic substances found in the tobacco leaf. For many, the milder throat hit is a plus, although some vapers prefer the strong throat hit that freebase nicotine provides. Benzoic acid also helps nicotine to vaporise at a lower temperature and makes it easier for your body to absorb it.
Our blog on the differences between nic salts and freebase nicotine provides a more detailed breakdown, helping you to make the right choice.