Hey, sorry for the really late response but I've used both. To me the formulas are very similar and they're both very concentrated. And they usually look a little darker in the pan then they do on and give a dewy finish. I like the NYX more since I really dislike MAC's shade range so far.... I think MAC should come out with some brighter or dark shimmery colors. NYX actually has a few bright and nice darker colors along with paler ones but there's no shimmery ones as of yet I think. Sooo, if you're unsure I'd go for the NYX first, sorry MAC!