Smoothness and speed are the two primary differences in nicotine delivery between nicotine salts (nic salts) and freebase nicotine.
These are the main differences:
Smoothness: being less harsh on the throat, it mimics the sensation of smoking traditional cigarettes.
Speed of absorption: Compared to freebase nicotine, nic salts are absorbed into the bloodstream more quickly and promptly.
Higher nicotine concentrations: Nicotine salts provide higher concentrations of nicotine in e-liquids without experiencing the unpleasant throat hit, which is basically associated with freebase nicotine.