After owning both for a period of time, I have come to the conclusion that they are very similar yoyos. The Cascade feels a little bit heavier with the dome SEs, but I find that the size and shape of the yoyos are close.
That being said, I definitely prefer the Cascade of the WM2. Therefore, my conclusion is that you can get a yoyo similar, but slightly better than the WM2 for quite a bit less money. Just my two cents.
Has anyone else felt the same way about these two yoyos?