As mentioned, i tried a straight jpeg comparison. It's not really apples to apples, the K5 is several levels of sensor development better and 6mp resolution higher, ( and in truth it's one of the great sensors imo) . If i can find one, a Canon 40D or similar would be a better comparison.
But anyway.
D200 with 35/1.8 at F/4
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Pentax K5 with 35/2.4 at F/4 .
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The Pentax probably has the more accurate colour , but i've never thought CCD strengths were colour accuracy, more the "feel" of the images. (Incidentally, on the rear screen the D200 sky looked aquamarine!!)