Dolch and Portland use different shades of gray. Portland is gray and black, whereas Dolch uses two grays, one very dark (GX) and one medium (GE). In fact, the grays used on SA Dolch are the same as DSA Dolch.
As for the "shine", both will be the same as any other SA set you can get, even the ones from SP. They all use the same molds. However, these being ABS the satin-like finish will wear away over time and become glossy. I have lots of SA sets from SP, and brand new they also have a satin-like finish. This is what they call their "semi-matte" finish, though I think it should be called "semi-gloss". They have a completely different finish called "gloss" which I don't think anybody has ever used for a custom SA set.