Originally Posted by icester
There is no difference if both files have the same size.
Also the only real full HD 3D is generated by Games using nVidia's GPU.
The 3D-Blu-Ray's 2D + Delta format is just a gimmick.
Frame compatible Side By Side will deliver the same quality or even better if compression ratios are the same or the file size are the same.
I disagree with EVERY sentence you wrote here.
I have 3 BluRay3D movies, they're all stereo FullHD (or the cinemascope equivalent) I also have an ATI GPU and I play my games in FullHD 3D on my dual projectors
MPEG4 MVC's 2D+Delta is the real deal and is the most efficient stereo video compresison format to date, if you have a good encoder you will get better quality for the file size than anything else for stereo video.
There is a difference between full and half res side by side, and yes of course it is visible, but the obviousness depends on the quality of the down and upscaling performed as well as the video compression format.
Compression ratios can be used to compare image quality between a source and it's compressed file, but not between compressed files of different sources.
Different sources compressed with the same compression ratios will also have different quality thus cannot be used directly to compare
If both full res and half res files have the same file size, they have different picture quality
With modern encoders, the picture quality and compression ratios are not proportional, so unless you are using extremely low bitrates if the two files have the same file size, the full res picture will look better visually than the half res picture.