Is there a difference between the two? i was testing out my new hk receiver and speakers and noticed that the R1 5.1dd sounded better than the R3 5.1dd soundtrack (same movie, same settings, i happen to have R1 and R3 versions of the scorpion king). I am now wondering if the 5.1dd soundtrack of all R3 dvds are inferior to the sound of their R1 counterparts.