I've used both and currently have both in use.
I just switched my Balls to shredded aspen again from Cypress and think I'm just going to stick with shredded aspen. The clean up is simple and I have no shedding issues.
I've always preferred shredded aspen and still stand by my choice of substrate. Sani-Chips are too finely shredded for my liking; I prefer Sani for my Kenyan Sand boas or colubrids.
I've used shredded aspen for my Blood, but because of her humidity requirements, some of the aspen would get moldy often. Wouldn't be a bad idea to try and see if you like.