Interesting! My Frigimore lasted 5 years before the tub bearing(s) died. When inspecting the old rear housing, it was easy to see that failure of the seal was the culprit.
Tumbler--- I think the reason the Frigidaire oversuds more easily is because there's more water in the tub. The Duets (and most other newer FLers, for that matter) use significantly less water in the wash portion of the cycle.