@Allthingsgirly67, if possible I would suggest going
to a Mac counter or a Mac store if there’s one in your area. I went to a MAC store. Sand is my DW shade. I got a pretty good match with nc20, but it pulls a bit peachy. I’m my experience studio fix isn’t as long wearing as DW though.
I find the double wear is thicker and harder to work with, but more “bullet proof” than studio fix. IMO the studio fix is thinner but coverage is easier to control.
Lately I’ve been creating my own tinted moisturizer by adding a bit of DW to my sunscreen and that has worked well in this crazy heat/humidity. I also saw something on instagram where a makeup artist added DW to an EL serum and the end result was really pretty and a bit glowy.