# Blu-Ray vs. HD-DVD **URL:** \ **Category:** NYSpeed Off Topic\ **Created:** [January 25, 2007, 8:08am UTC](https://forums.speedlife.net/t/blu-ray-vs-hd-dvd/23570 "2007-01-25T08:08:24Z")\ **Posts on this page:** 1\ **Showing post:** 126
**Author:** ![VANDIT](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/vandit/32/4977_2.png) [@VANDIT](https://forums.speedlife.net/u/VANDIT)\ **Post date:** [January 5, 2008, 10:45am UTC](https://forums.speedlife.net/t/blu-ray-vs-hd-dvd/23570/126 "2008-01-05T10:45:05Z")
The differing track pitch of the Blu-ray disc makes its pickup apertures differ, however—0.65 for HD DVD vs. 0.85 for Blu-ray—thus also making the two pickups technically incompatible despite using lasers of the same type. HD DVD discs also have a different surface layer (the clear plastic layer on the surface of the data—what you get fingerprints and scratches on) from Blu-ray discs. HD DVD use a 0.6 mm-thick surface layer, the same as DVD, while Blu-ray has a much smaller 0.1mm layer to help enable the laser to focus with that 0.85 aperture. HD FTW… I would much rather have a disc that is more resistant to scratches etc… --- _[View the full topic](https://forums.speedlife.net/t/blu-ray-vs-hd-dvd/23570)._