I honestly think either will look amazing, and you should go with whichever one really makes your heart go pitter-patter. If you are secretly hoping for and cheering on one of the stones already, and just hoping we will all pick that one, you may already have your answer, and you should go for it!!
I really do love that setting!! Reminds me of the graduated french cut setting that I dream of. And if you really want another opinion, I will say that even though I am absolutely insane over the CCC from Wink, the Asscher really compliments the step cuts beautifully.
I just don't think you can go wrong on this.
How about if Wink puts one of each stones in it and sends you pics before setting it? (Even if it's not the exact size stone you will be custom ordering). Then, we get to all vote again! lol.