Well this has been interesting. While the comments thus far are varied, there do seem to be two fairly common camps: the "2 & 4 Crowd" and the "3 & 5 Crowd." I was no exception. I gave #3 the edge over #5.
The idealist in me hopes that the winner of this test is the pro mastering house, because damn it, computers can't take over humanity just yet! But my selfish side hopes that LANDR is the winner. Cuz then I could save a ton of money mastering my music. :)
That being said, even IF LANDR does come out on top, I think it's important to remember that A) this is all subjective and NONE of those masters were right or wrong, just different, and B) this is but one song. I'm sure LANDR can yield fantastic results in certain situations, but in others it might fall on its face.
I haven't tried LANDR yet, by the way. Figured I'd go into this fun little exercise completely oblivious, much as I do with everything else in life. :)