A Couple of Draw Call Questions

Hey, guys!
I have a couple of questions regarding draw calls. Sorry if they seem too basic or redundant, but I haven’t been able to find conclusive answers, and some of the answers I found online were contradictory. Anyway, here are my questions :

  1. What is the difference between mesh draw calls displayed by Stat SceneRendering, and draw primitive calls displayed by Stat RHI?
  2. If we have a mesh with only one material slot, does it count as one draw call or does it count as two (one for the mesh and one for the material)?