Visually, you have no difference. Sound-wise, there is a slight difference because Blu-ray can play uncompressed sound (but it's virtually no different to the human ear). Blu-ray discs have 50gb of storage on dual-layer while HD-DVDs have 30gb of storage on dual-layer. HD-DVDs for now, have Picture-In-Picture and some other interactive features while Blu-ray is implementing with new discs (the first being Resident Evil: Extinction and War). But no worries since the PS3 can be upgraded to support it with the firmware 2.10 update. Blu-ray also has the backing of most major electronic companies such as Samsung, Sony, Pioneer, Sharp, Apple, etc. while HD-DVD has Microsoft and Toshiba. Blu-ray has exclusive studio support from: Warner Bros. (come May 2008. right now, they are releasing on both HD-DVD and Blu-ray), Disney, Sony Pictures, Lionsgate, 20th Century Fox, and MGM. HD-DVD has studio support from: Paramount, Universal, and Warner Bros. (but Warner Bros. is only releasing on this format until May 2008). That's pretty much it.|||I have both PS3 and a HD-DVD player. The both have the same resolution but the only difference is that Blu-Ray can hold more information 50GB versus 30GB for HD-DVD. Also HD-DVD has picture in picture capability (watching the movie while another screen shows up like behind the screen interactivity). Blu-Ray will have picture in picture sometime in 2008.|||Blu-ray is slightly bigger capacity wise, but is like 20x more expensive to make.

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