Thanks, Steve
Eddie, compared to the BOL Hotpoint that friends had, the GE was a quieter dishwasher. I think with the outer cabinet needed for a rollout there was a tiny bit of sound shielding from motor noise, but who cared, really. The noise meant that the machine was doing the dishes and in most older homes, the kitchen was not connected to the den or living room (who knew from family rooms then).
Note the brown glass bleach bottle we were talking about in another thread. Some of you youngsters might never have seen one. The bleach reservoir and pump metering system was soon eliminated in favor of a plain dispenser similar to the combo's. The fumes of the bleach in the reservoir ate up the cabinet around that nice dispenser plate.
The combo had an unbalance switch of sorts in the left front leg. If the machine rocked up and down too much on that leg, it stopped the spin, returned to tumble to redistribute then resumed spinning. Because the undercounter model was locked to the floor and had the countertop restraining it above, it often extracted a bit more dependably than the free standing model unless you knew to sit on the left front corner during spin to hold it down and fool the switch.
I wonder why each of the dishwashers, in ascending model number order used more electricity and had a higher total connected load; longer dry, longer heated wash in the SU-70 for heavy soil, maybe?