Stylistically, Casio has created an attractive calculator designed with a solid body and slightly ovalshape that fits comfortably in the hand, and finished it in several shades of blue to evoke an intellectual look.
Granted, Klipsch has that ovalshape all sorts of locked down, but once you've used an ear tip that's actually engineered to fit in one's ear (hint: ear holes aren't perfect circles), you'll have a hard time using anything else.