Size matters, but most important is horizontal vs. vertical
Although I'm a GE devotee, I'll never forget the V-12 machines (rated capacity of "heavy mixed fabrics") that miraculously became V-14 machines for a couple of years, then, even more miraculously, became "HEAVY DUTY 16" machines for about a decade. After filling our V-12 machine to the gills(tub retainer ring) with dry laundry, I measured the load topped-out at 10 lbs. using a balance beam. I suppose 2 more pounds could have been packed in, but nothing would have moved around. Maytag used to dodge the issue handily labeling their 1970 machines as "Regular" and "Large" capacity models. My LG, currently, can be stuffed with about 20 lbs. of mixed laundry and it will wash it without a hitch. I don't launder my lead aprons or my automobile tarpaulins. Sorry GE.