After all of this talk about the great extra's, I went out and picked up the Dolby Digital version of Apollo 13. I was curious about the feeling that the DD video is better than on the DTS. I did some back and forth comparing between scenes. Just to state the obvious, I'm not a videophile and this comparison is not very scientific.
My setup
Panasonic XP30 with Farjouda DCDI chip in progressive scan mode into a Pioneer Elite 530 Widescreen set via BetterCables Silver Serpent Component. Elite RPTV set to Reference Theater Mode to disable unneccesary video enchancments, such as SVM, and tweaked with Avia. Screen mode is Full to use the anamaphoric enchancment on the dvd's.
First, I checked the video bitrates of both DVD's using a free program called DVD Bitrate Rate Analyzer. The program can give you video bitrates at any point in the movie and an average bitrate. These were the results of the average bitrate of each:
Dolby Digital DVD: 5.82MBPS
DTS DVD: 7.41MBPS
Clearly, the DTS DVD has the advantage as far as bitrate is concerned.
I sampled several scenes back and forth, such as the early scene where Jim and his wife are in their yard looking at the moon. Also the launch scene, and the landing. To my eyes, the DD dvd seems sharper, but seems to be more grainy in some scenes, like the Yard scene with Jim and his wife. The DTS looks softer but the grain is not as apparent. I'm not a videophile, so there are probably things that I missed, but I wonder if they didn't increase the sharpness on the DD version due to the lower video bitrate? I would love to have Bjoern Ray check both of these and get his views on them.