Dobro,
I am still here. I opened my can of whoop-ass so that there would be no quiestion of the file that was 24 bits.
First off, I really liked this song. I love melancholy. I also prefered the vocal sound. Given this situation, it would have been easy for me to say that low was the 24 bit version simply because it had less noise and a better vocal.
BUT. I have not heard the third mp3 yet, so I cant tell you if these two are 16 bits or if they are both 24 bits, but one thing I can tell you is...
with my can of whoop-ass(Lucid genx6) opened , without a doubt, LOW sounded more real. The guitar sounded more real, the vocal sounded less flat. I could not reach all the way to the end of the space, but I could reach farther than tip. In short, low had more 3 dimensional depth and low level detail. It sounded less smeared,not to talk of a better vocal sound(which can be mainly attributed to positioning and equalization).
Now, I am ready to hear the third file and make my final judgements.