I find it interesting that Peking Buffet rates only a 7.1 vs. Ming Dynasty's 8.6. I rate them both a much more modest 6 and I obviously think they're much closer in quality to each other. I alternate between the two. While Ming Dynasty has a brighter, more attractive dining room, Peking Buffet wins points from me for having more beef and pork dishes and pork fried rice. Although it doesn't matter to me, you might prefer Peking because of its sushi bar (priced separately from the buffet). I don't eat sushi so I can't vouch for it but people seem to like Peking's. Service is sometimes a bit indifferent but in a buffet that doesn't matter too much.
Pros: Nice variety, good value, sushi bar (not included in buffet price)
Cons: Service a tad slow sometimes