Yes, less nicotine will have less throat hit but there are other factors as well, such as: the nicotine a vendor uses (some are better than others, some have a very peppery like quality to them which I don't like), the juice your vaping also has an effect bc some juices just have more throat hit, some less, and some just have a satisfying one.
As the post above me said, the tank your using will also make a difference. Generally if a tank has less airflow you'll have a larger Throat hit. Have you considered trying to request a special nic level from your vendors? You don't have to vape a certain level, those numbers are more of a standard for consistancy and not a rule. Maybe instead of 12mg go 1st to 14mg or 15ng. Good luck