There have been several experts weighing in on the samples; about half say they are similar, half say they aren't.
Maybe I'm late on this, but did anyone hear that there were in fact TWO separate DNA samples in/about the underwear? That's the source, they're saying, of all the confusion. One was not useful but the other had 10 markers, enough to put into the FBI db. That's the one they are going to compare to.
http://www.rockymountainnews.com/drmn/local/article/0,1299,DRMN_15_4940501,00.html