From HT magazine:
The Pioneer was the winner in both its off-axis and motion performance. Plasmas are, by nature, more like direct view CRTs than any other new display technology (apart perhaps for the stillborn SED) with respect to their off-axis viewing quality and resistance to motion lag. So it was no surprise that the Pioneer was the clear winner in both of these categories, though the differences were much more obvious in the off-axis category.
While the Samsung could be set up to be considerably brighter than the Pioneer, the differences were subtle at more realistic levels, such as the settings I used. The only exception, which favored the Samsung, was on scenes demanding high brightness over the entire screen. That is, in general, a strength of LCD and a weakness of plasma, though I never found it to be a serious limitation of the Pioneer.
It was a close run in black level, but ultimately I had to come down on the side of the Pioneer. Despite the fact that the Pioneer never went completely black on fades between scenes, and the Samsung could, the Pioneer worked better for me in some very dark, low contrast program material. Samsung's local dimming can provide little or no benefit for such scenes, since there are seldom any areas that can be selectively lit. This is the only type of material in which the Samsung reverted to that gray haze look. A good example of this is a night scene in a church in Saving Private Ryan. On the Samsung, the image had a rather flat, grayish, subtly washed-out appearance. On the Pioneer, the actor's faces popped just enough, in front of deeply shadowed backgrounds, to give this difficult scene a reasonable sense of depth.
I've seen Samsung properly set-up and it still suffers from motion-blur, seemingly no matter how many gimmicks they put in the set to combat this effect. The blacks might be dark, but the set still cannot muster the detail that plasmas can. When I buy an HDTV, I want to minimize the number of artifical filters, noise enhancers, LED backlighting gimmicks, etc for a more natural looking picture. Samsung seems to want to add as many to this set as they can, and its MSRP of $4500 is very high for a 52" TV. Also it still cannot accept 1080/24 sources, well it can but it converts them to 1080/60 so whats the point?