I haven't compared them head-to-head, but have heard both speakers, in addition to Nines, 3XL's and Orangutans on different occasions...IMHO, if you like the 88's, I can't imagine that you wouldn't enjoy Super 8's. If you're looking for the closest thing to 88's at a lower cost used, Super 8's would seem to be an obvious answer.
If you couldn't tell...I quite like the entire Devore line.