What are the differences between the two yoyos
I second this question. I’ve finally got my choices down to these two and I can’t decide myself. Both finally have some beautiful colorways. From me: How fast can these play? How’s their grinding? Can they maintain spin after a long and hard combo? Smoothness/quietness?
Sorry to intrude on your post Baseball, but I figured it’s better than making a new one for myself 
I think all of your questions are valid for both yoyos. Supernova plays fast and Genesis grinds great. I personally like the Supernova better because of it’s unique shape. Plus, I like the 2012 Supernova’s colors better .