Blu-ray and HD DVD are both high-definition optical disc formats. They offer nearly identical resolutions, and both have the potential to offer very high-quality pictures. However, the two formats are not compatible with each other, and consumers must choose one or the other.

Blu-ray discs typically offer more storage capacity than HD DVDs, and they also support a variety of extra features, such as picture-in-picture mode and commentaries. However, HD DVDs can be produced at a lower cost, and they are playable on more devices than Blu-ray discs.

In the end, the choice between Blu-ray and HD DVD comes down …