This is something I've been thinking about over the past few weeks.
Both were highly under-appreciated while they were here, both left town without bringing a championship, and both groups of fans learned in short order what they had in these "imperfect" players. They both did everything you'd want a player to do for you while they were here, short of delivering said championships.
I know it's not a perfect correlation, as Ewing is probably a bigger disappointment due to the expectations he brought with him from G'Town, but I think it's a fair comparison.
Maybe while we're at it, we can say that Doug Brien = John Starks...