[2023] Question about skill interactions

Heyho fellow redditors,

sorry if this question was asked before. I tried to check, but couldn't find it. But I like to know what happens if one spell automatically casts another spell. I use Spriggan Form as example, because I don't play the game for long and I'm not sure if other such interactions exist.

So in Spriggan Form I can specialize in "Spirit Vortex" which gives "Spirit Thorns" the chance to automatically cast "Maelstrom".

And here's the question: Is an auto cast version of a spell always the non specialized spell or are specializations applied? For example I've also specialized in "Mealstrom" and have the "Whirlstorm" node activated, will the auto cast version also have a longer duration?

Games of this kind are whonky sometimes and not all interactions are the same. In PoE skills granted by items are affected by socked support gems for example. But in other games a spell cast through another spell is always the "vanilla" spell without modifications.