Hi Rubens, welcome to the cameralabs forums!
1: What you're mostoly seeing there is the effect of different exposures and image processing (not to mention variations in lighting as they were taken on different days), although the K200D's larger photosites would suggest an ability to enjoy a higher dynamic range than the A350.
2: The optical viewfinders of DSLRs are normally much preferrable to Live View for action shooting as there's no lag on the view itself, and you also get to use the camera's main AF system, whereas in Live View (A300 and A350 excepted), the AF is normally much slower. As for time delay, the K200D is pretty quick.
3: The lens used was a Pentax 18-250mm - see the features or results pages of the review: http://www.cameralabs.com/reviews/Penta ... lens.shtml
http://www.cameralabs.com/reviews/Penta ... ults.shtml