Moore Maker had a "golden period" when their knives were really nice, in the late 90s/early 2000s. Both the Camillus-made and Queen-made knives were pretty consistently well-made. Once Camillus went under and Bear & Sons took over the lower-end models, the quality dropped off. Also, I've heard lots of people say that the Queen-made knives suffered a dip in quality as well.
My personal experience with Moore Maker is limited to the Queen-made knives (I never got around to picking up a Camillus, and for that I'm kicking myself). I found that the quality, at least in around 2004 or 5, was about the same as Queen's regular production. I didn't see anything that would justify the extra cost... especially when there's a chance you may receive one with some F&F issues (gaps, play, whatever).
Unless you can get one of the really nice ones from 6 or 7 years ago, you're better off just buying a Queen in my opinion.