Throat hit is not, by and large, due to the flavor or brand of juice. It's due to battery power and how warm you can get the atomizer. Nic strength plays some role but minor in comparison to battery size and atomizer type.
i once though this same thing... until....
i was using the licorice juice from nHaler.com in my 510 , good throat hit , but i ran out of juice , so i grabbed some licorice juice from litecigusa.com and continued topping off the same cart i was using with the nHaler juice , same atomizer , fresh battery .... zero throat hit. Both juices were in the "HIGH" strength. There is something else going on here