The OZ-590 is slightly larger than the OZ-800. It is longer by
1/4 inch, and wider by 1/8 inch. While in its leather case,
the OZ-800 is 3/16 inch thicker than the OZ-590. The OZ-590 is
sleek, smooth, attractive and easy to slip into a pocket. The screen
size of the OZ-590 is about 1/8 inch smaller in both width and height,
compared to the OZ-800.
The screen of the OZ-590 is noticeably inferior to that of the OZ-800.
There is a visible grid embedded in the screen, which is unattractive.
Also, the clarity and contrast of the screen is not good at all. The
screen is dark, even after being adjusted, and the fonts are indistinct.