For me, the ss exia seemed to have more umph in play than the akita. I have yet to try the brass exia but I imagine it would feel even more powerful. My best guess is that the akita naturally has more center weight due to its design, but I also have no idea if that is true or not!
You honestly can’t go wrong with any of these throws tho!!
I have both, with the SS rim Exia. The Exia was one of my first bimetals, no regrets buying it. However, once I got the Akita, I began throwing that more often, it just played better for me. You’ll be happy with either one for sure.
The brass Exia is a powerhouse, it spins forever and is stable as can be, I dont miss with this yoyo. Akita is nice and very close to the Exia but it just doesnt last for me, ai always run out of spin but its still a great yoyo. I would go with the Brass Exia.