Good to know.  Please leave these masters available for a while, won't you?  I'd like to listen a few more times.
 
I certainly had no inkling as to which were or which were not LANDR'd or Pro Mastered.  I only knew that 2 and 4 were very similar and the others were in a second group of similar sounding tracks.  I remained neutral on the loudness war.
 
What I keyed on were the first lyrics, those first consonants and the smoothness of the vocal.  Masters 2 and 4 seemed to preserve the original vocal while the others added a grit or edginess that didn't sound natural to me.  I figured it was the result of compression and/or limiting, but to my ears, for this song, it was too much.
 
Thanks for doing this, Cakewalk Staff!  A valuable exercise.

All I care about is that I voted for what I thought was the professional mastering job and I was right.

> we believe that for a song of this style, the resultant level was part of the criteria for the quality of the masters.
 
True.
That's why I rejected all loudest masters and made my choice between the two most silent ones.

As I said above, I had voted online for #3, and the drum sound was one of the main factors.
 
I am surprised there were not more comments about the drums, and the snare in particular (although it is possible I overlooked some).

bapu
All I care about is that I voted for what I thought was the professional mastering job and I was right.

I also picked #3 early in the game, and even though I recently had a hearing test that indicated I had high frequency loss, either my mastering ears are still working, or the Pro Mastering Engineer suffers the same loss. 

konradh
As I said above, I had voted online for #3, and the drum sound was one of the main factors.
 
I am surprised there were not more comments about the drums, and the snare in particular (although it is possible I overlooked some).

Yup, that was a big one for me too - the snare had more "snap" in # 3, something I felt was important for the song/genre. 
 

I don't know. I hated pretty much all these masters. The problem to me being that I felt that many of them had good attributes but also contained things I would have changed. Some of them had some nice punch yet removed all dynamic appeal. Others sounded good but were so quiet compared to everything else and lacked the benefit of having that nice punchy feel. One thing that really got under my skin is that 4 of these tracks had their soundstage setup in a way that made the main vocals sound like she was singing into a tube.
 
All in all, I am torn. I like 2 and 4 the best because they hold on to the general feel of the style and have more dynamics where everything else just kind of feels like a hot mess trying to compete in the loudness war with EDM style punchy-kicks. A little goes a long way. There isn't an on/off switch that gives you only two options. Tone it down a bit.

Because #0 was not an option, I chose #4 because it was the closest to the original. Conclusion: LANDR on its gentlest setting is almost as good as no mastering at all. I'm actually impressed.

It would be interesting to hear more about what the Cakewalk guys used in their mastering chains. I thought they did a Great job and were using the Sonar plug-in suites.

bapu
All I care about is that I voted for what I thought was the professional mastering job and I was right.

Well done!