Bosch's wash pumps have been 3 phase variable speed for a long time. as far as I know, the point voyager platform including the newer maytag variants have always been single speed motors, whereas the kitchenaids/maybe higher end whirlpools with the global wash system/resource saver/tahoe platform have had either fixed or variable speed wash and drain motors. I took apart my aunts KA diswasher from about 2015 a few weeks ago to swap the sump assembly out of her other identical one because the door was warped and wouldn't shut fully. the pump was not nearly as small as some people on here have described, and certainly seemed powerful. it was definitely smaller than my Point voyager based KA, but since it is a variable speed motor, more power is available due to the efficiency brought by the 3ph construction. The tahoe wash system shares the most in common with bosch dishwashers, but the new platform seems to have gone back to single speed motors, presumably because the filter design requires fast speeds to perform as expected. I am not sure if they have eliminated variable speed pumps entirely, the drain pumps might still be variable speed, but the wash pumps at least on the KA/Maytag offerings are single speed. I know the whirlpool and Jennair ones have a filter based system still, so I wonder if those have/will have variable speed pumps? or maybe whirlpool has moved away from the variable speed pumps entirely.