David, I don't have either grinder, but you won't find many here that would recommend the Mini over the Super Jolly. SJ is top notch, unless you're going to go up the grinder food chain.
Caveat being the
Mazzer Mini E has 64 mm burrs like the SJ, and is not the same animal as the regular Mini. It compares favorably to the SJ, but is more
expensive than the mini or SJ.
My $.02 FWIW, I'd say get the SJ and don't look back. There's one in my future once I get the counter space.
Living the caffeinated life.