Gaffer Tape said:

You don't happen to know where I can find some of those comparisons, can you? And are you saying you have the 4-Disc set but not the proper audio?

I used to, but I no longer have the disc itself (I just have an MKV rip of the theatrical cut from said disc).

The first pressings of the 4-disc set had the 5.1 remix (as intended), but the 2.0 stereo - which was meant to be the original mix - was just a fold-down of the same 5.1 mix. When fans bitched to WB about it, they instituted an exchange program, with the fold-down replaced with the original stereo mix.

And I don't remember where these comparisons were, but I'll look around and let you know if I find them.