What is the difference between "Blu-ray DVD" and "HD DVD"?

What is the difference between "Blu-ray DVD" and "HD DVD"?

Jeff Colen (President, A Sharper Home, Inc.) gives expert video advice on: Do I still need a VCR?; What types of DVD players are available?; Will Blu-ray and HD DVD players work with my current set-up? and more...

The difference between HD DVD and Blu-ray is that Blu-ray has the ability to store more information on a disc. It also provides a higher definition picture than the HD DVD. On the flip side, the HD DVD is less expensive, both for the DVD itself as well as the player. In my opinion, in the format war between what's better, HD DVD or Blu-ray, there is no clear choice at this time. We're waiting for the joint players to come out that will play both formats, and they should be out later this year. I like HD DVD a little bit better, just because I think it's going to win because of price.