I finally hired a painter this morning. What a relief. After the first quote I got, which turned out to be more than 3 times anyone else's quote, I called way too many painters and got too many quotes, and now I feel badly about that. Anyway, I hired him and he's doing the living room walls and cathedral ceiling next week.

Now I have to decide on paint and sheen. Both the walls and the ceiling will be BM Mascarpone (an Affinity color, if it matters).

Would doing both the walls and the ceiling in a matte (not flat) finish look strange?

I guess I'm going to have him use BM paint, as I've read here that color matching is not guaranteed across brands and since there is a ton of Mascarpone elsewhere in the house, I'd like it to match as well as possible. I was thinking of having him use the Regal Matte (he'll use any SW or BM paint I want other than the el cheapo contractor grade stuff).

Any thoughts on that plan?

Thanks to all the experts here who go out of their way to answer these questions for us novices!