Meaning of configuration options ( General purpose or Optimized for Vectors) for azure erverless

What do the configuration options ( General purpose or Optimized for Vectors) for azure erverless mean.

I found this blog but it does not contain any specifics.

The Azure docs have nothing aswell (it told me I cant link to it here)

I could not find any docs about the difference between General purpose or Optimized for Vectors and what I should use when doing hybrid retrival RAG.

Could someone provide guidance on this choice?