Hi, Ted;
Have a look at the images below. In both images, the first one shown is the fullnut's.
This one in intended to enhance ALPHA string differences.
This one allows you a complete view of all numbers, [=] and underscore.
I myself have no trouble using any of them, I think it's a matter of taste; for me, after using them fr a long time, differences are not too big. Anyway, you should take them both in hands, because even not precisely "felt" in these images, halfnut LCD characters look weird at first "contact", allowing even a confusion when trying to figure out who is who. It "scares" a little bit, but you may get used to it. I take the extra rounded-edges black frame in halfnut's display as a particular fancy touch. I once tried a custom halfnut-like frame in one of my fullnuts and I liked it a lot, but I removed it to use as reference to cut a few others and lost it; I'll take it back as a near-future design project ;^)
Hope this helps you. And remember: try having a halfnut in hands an you'll have a better "feeling".
Luiz C. Vieira - Brazil