The pump kerosene I've used had a slightly green/brownish color to it whereas the Jet A fuel I got was clear as water. So at least around my neck of the woods, kerosene and Jet A are not the same. I believe Jet A is refined more and is cleaner. In my model diesels, my kerosene and Jet A run the same, make the same power, and are equally sooty. I do intend to experiment with regular pump diesel #2 to see how it runs.