What are the in-game differences between Wiglett and Nonokurage and regular regional forms?

The only ones I can think of is the name, and the fact that they cannot produce an offspring of the other species with an everstone (e.g M Sandsrhew (Everstone) + F Female Alolan Sandshrew will produce a common Sandshrew, whenever they breed, however M Diglett (Everstone) + F Wiglett will always produce a Wiglett).