EOS R firmware

I'm sorry if this has been mentioned before, but I didn't see a title that indicated this question so here I go.

Does anyone know if the EOS R has DSLR or Powershot based firmware like the M series camera?
I'm just wondering since I plan on buying the new M5 Mark II when it comes out. Maybe the firmware base of the R can give us any indication as to what Canon is planning convergence wise on these two lines.

Cheers,

J.S.