I can't tell the difference between a sample painted with Gray Wisp mixed in BenM Regal Matte and a sample painted with an original can of RH Silver Sage -- there is zero difference between the cans I own/use as well as other mixes I've seen/spec'd.

The sheen of satin or egg will make a difference. Just like there would be if you bought RH paint in different sheens.

I would not hesitate to order Gray Wisp from BenM mixed in Aura eggshell with the expectation that it's going to look just like Silver Sage from RH mixed in an eggshell base. Matte is the closest to Regal Matte, but eggshell should be just fine.

Of course, the only way to know for sure if crossing brands is the right thing to do for you, is to buy a quart in the brand, grade and sheen you ultimately want to use. :-)

Funcolors-Thanks so much for getting back to me. I take it that matte is the same as flat? I would really like something that I could touch up when I decide to move pictures. I haven't been able to do that with eggshell which has been a downside. Do you have any advice regarding this? Thanks again.

Aura matte is enough of a sheen for how my family lives in and uses our house. I think it's pretty tough stuff - all I ever need to do is wipe it down.

Matte is not equivalent to all flats. Each brand's sheen levels differ. There is not a set standard for those gloss levels which means that all flats, eggs, satins are not created equal.

Aura matte has a slight bump of sheen. It is not shiny but it is not a dead flat-flat. Most of the time the word "matte" indicates a degree or two or three or more up from typical flat.

Even tho there are no standards, I feel comfortable saying that across the board and in all brands matte does not mean the same thing as flat.

Both Aura matte and eggshell will touch up reasonably well -- better than most other brands. But, that all depends on specific color and how angles of light fall across the walls. Aura matte or egg are both good bets.

Hope that helps. :-)

Thank you so much . I am headed to the paint store shortly and plan to get aura matte.