As you can see side-by-side these two are nearly identical and I found both to be 99% dupable for the other.
Left swatch Makeup Geek's Poolside, right swatch Saucebox Cosmetics teal from Temptation
Left pic indoor with flash, right pic natural light no flashOver Glamour Doll Eyes Control Freak
Which do I like better? Both really and here's why.
In terms of quality applying it I don't see much of a difference as both are soft, creamy and pigmented. I think Saucebox looks wee bit darker to me in person but honestly not by much and it could be that I had a little more color on my finger than MUG.
What I like about Poolside from MUG - you can buy it individually while the teal from Saucebox is not available for individual sale, so point to MUG. What I like about the teal from Saucebox you get more product, 5 grams versus 1.8 grams from MUG, so point to Saucebox. So to me it's tied and I'll end up using both. Which ever color you choose I think you'll be happy with your choice.