I am of the opinion that there is either a very broad range of Mission / Black Mission variants, or two similar but different varieties.
Some are fairly pale red / pinkish on the inside, looking almost like a Brown Turkey. Others are much deeper red. Some have very shiny skins, and others seem less shiny.
The pix above of a BM leaf is pretty accurate but they can be more plain and more deeply fingered, as well.
I believe that they all have some pinkish color in their leaf stems - some more so than others.
See Black Mission for some of the range of colors.
I hope to take pix tomorrow of a tree that I suspect is Black Mission, but has leaves that look like Brunswick.