I had a miniM matched to my VBM for about a year, till I just upgraded... I found the grind setting for both to be the same ( do you mean single / double spouts or single / double baskets ??? )..
I also started to single dose by weight.* 16 g for my double basket ( I never use the single basket )* With either spout the setting was the same.*
But I did find I could grind a little finer with my naked pf than the spouts..
Im sure others with more wisdom will fill in the gaps* :) :) :) :) :)