I used to use NC11.5, but I bought NC11. I feel like NC11 lets the skin underneath show through a little better (although it does have excellent coverage). I have reddish skin, and my neck is paler than my face, so I like to use yellow foundations. It seems a little yellower than 11.5, but it's not much different. I'll use it for a while and see how it goes. Also, the texture and durability are impressive. It doesn't dry out and crumble, so I'll end up settling on Mac.