I just picked up an ER ('96) Smokey Joe for a parts project and compared to my sideways K ('88) the leg locations are different (more widely spaced), the integrated grill grate rim is more pronounced, making for a more positive landing spot for the grate AND the ash pan can be easily replaced with a different diameter (pie pans etc.)
Overall, the 1991 changes were all for the better IMO.
But I don't need two SJS's, so my K might become a light fixture or be sold.