The main difference with the GE Potscrubber II was that it had a separate upper wash arm for the upper rack rather than the stupid tower that GE has used for years, along with a filtration system like the ones in GE's Potscrubber III and beyond models. The lower arm I believe was stainless steel (if I remember correctly) and the upper arm was plastic. The top arm was the short plastic arm the is still in use in some of their models today. The center arm was fed by a tube from the water pump chamber that came up from the back of the machine. The upper rack was adjustable up and down, too. They were fairly quiet machines to boot. Several of my relatives had one, and they did a pretty good job washing, and they are still around, over 20 years later, and still going. I know they were around in the early 80's - that's when the first one popped up when my cousin bought her house on Long Island - '82 I believe. Basically excellent dishwashers with three full wash levels, usual GE cycles, filter systems, quiet, but they didn't seem to last on the market very long. Had a flat lower rack that was fully usable, and the extra deep upper rack, adjustable, similar to what they make today. Same silverware basket as all Potscrubbers.
I really liked 'em....