Following up on their useful examination of HD-DVD, TeamXbox has published an easy-to-understand run-down of the facts concerning Sony's Blu-Ray (aka Beta-Ray) format. They're even kind enough to summarize their own article:
- Blu-ray Disc has a higher storage capacity per layer than HD DVD.
Blu-ray Disc has a higher transfer rate and recording speed that HD DVD as the result of
using a higher value of NA.
- At 10,000 rpm rotation speed results in a 12X Blu-ray Disc drive while that is equal to 9X HD DVD.
- Therefore, HD DVD is required to rotate at higher speeds to reach the same transfer rates of Blu-ray Disc.
Disc media has a different internal structure than HD DVD and DVD. Thickness is the same for the discs, but different
for the layers inside.
- As a result, hybrid discs are easier to develop on Blu-ray Disc
because of the format’s 0.1mm thickness for the data layer. A single side Blu-ray Disc could incorporate a dual
layer DVD-9 (8.5GB) disc, but in the case of HD DVD, that requires a double side disc.
- HD DVD media is less expensive to manufacture than Blu-ray Disc because it doesn’t require significant changes to existing production lines.
[previously: HD-DVD vs. Beta-Ray]