Dura wash has no grinder. Zilch, Nada. In fact the impeller disc assembly part number 3369012 has no grate, chopper, or anything to do with food particles. If you mean the impellar itself, its worth atmospheric air in terms of maceration. The dishwasher relies entirely on the sump grate to prevent anything larger than a bread crumb from entering the pump. Food bits pile up on top of the grate and eventually clog if not removed. Stinky, awful. The soil settler might remove one or two stray coffee ground that just happen to migrate there, the rest is recirculated unhindered.
Dura wash was more durable and reliable than GE in some rehards between 1994 and 2006 yes- however wash performance was always much worse than GE. GE had actual maceration and did an excellent job of cleaning in the corners of the top rack even with the bottom rack full. In 2001 GE switched to a solid metal hard food maceration blade that did not break off and in 2007 GE added a fine filter to their BOL models which made a night and day difference in cleaning and soil removal running circles around durawash. Dura wash also can't be repaired, more often that not the impeller rusts to the motor shaft making removal impossible.
Dishwashers are all just about the same with prerinsed dishes. Skip the sink and that all changes.