Sorry - should have said, if it was me and I could only have one, I'd get Encore because I prefer the hexs. You have 3 ways of turning the triangles to give 3 effects, you don't have to mess around with filling in the corners and you can use the hollow blocks. Also I think the hexs blend better, in the octagon blocks you see the individual blocks more clearly. That's just my personal preference though. :D