I won't go that far. Like I said, I do have some possibly unfounded fears of TrueHD implementation. But, again, there should be no difference in theory. And, again, you can't compare an apple to an orange. You need to compare the exact some movie soundtrack to know. And even when you do that, you need to level match the tracks. Not many movies offer both MA and T-HD on the same disc. Close Encounters of the 3rd Kind is one of the few, for example.
For legacy tracks, I totally agree. However, on DVD, we are talking about 448 kbs for DD vs 768 kbs for DTS. And DTS offered discrete 6.1 tracks. (EX is a matrixed track, AFAIK). LOTR ES versions, Xmen3 were some of the more impressive 6.1 discrete tracks that I've heard for action DVDs.