Personally I don't think so, especially if you have 2 PP. I thought I was going to need a BU of QS, but PP is pretty damn close. QS is a bit darker & PP is a bit brighter. Also, they're different formulas, QS is more matte & PP is creamier. On skin you can see the slight difference, on lips it's a less noticable difference. CYY is a lot brighter than those 2.
I hope this helps people that are lemming QS if they have PP, but if you don't have either I honestly would stalk the MAC website or call every store in your area to get QS. There's a better chance of scoring QS than PP. Those 2 colors seriously rock my socks off & so does WMS.
If anyone was wondering, but I am sure this has been brought up WMS is a lot brighter than Flamingo. WMS is more coral & Flamingo is more peach. I recommend anyone to get both of those colors as well! OK, I will stop enabling...
Here is a picture of the comparisons on NC30 skin tone...
Top: Candy Yum-Yum
Middle left: Quick Sizzle
Middle right: Pink Pigeon
Bottom left: Flamingo
Bottom right: Watch Me Simmer