Quite honestly I don't know enough about the differences in the names. As I said, I've seen them used interchangeably and conflated. There is a lot of upg in heathen and pagan religions too. For example, there are large gaps in the lore of Asatru. A lot of literature was preserved, but I shudder to think how much was actually lost. So some elements have to be extrapolated, or pieced together, sometimes based on gut feeling or intuition of what is right or not. Some people I've been conversing with have mixed pantheons, from different traditions. I still believe in the Hindu deities as one group or class of deities. I always did. And while there are overlaps between some of the Hindu and Asatru deities in functions, my gut tells me to not mix them in the same shrine or worship. To me, the Asatru deities are more rough-and-tumble-in-your-face, while the Hindu deities are more subtle. Yet other people do it without feeling the "creepiness" I did.