Salt is salt. Sodium chloride, period.
Anyone who tastes a difference has been influenced by the packaging, or there is some other additive involved.
It's like the bottled water nonsense.
Different particle sizes have an effect on how much salt goes onto the food, but that's it.
And the DUmbass who shopped for salt at an "organic festival" should be advised that salt is as inorganic as a substance can be.