@middachten thanks for your feedback. I have put a lot of time into this and I agree ABX isn't for everyone. But it's the easiest (and many would argue best) way the average person can make an unbiased comparison given the limitations.
Even though the files have arbitrary names, the comments of others (and even potentially from me this being a single-blind test) can bias the results when people know which file they're listening to. The Foobar ABX comparator can remove that bias.
I should also point out Foobar ABX can be used two different ways. It can either jump back and forth between the tracks keeping the same place in the song. Or you can select your favorite part of the track and it can repeat that segment each time you switch. For those who don't have it installed, this YouTube video (not done by me) has examples of both methods in use:
I also wish it were legal (and more practical from a download time/bandwidth perspective) to share the entire tracks. That would allow more extended listening for those who prefer it. But that's not realistic here so I tried to do the best I could. And some have already identified solid differences with their ABX testing of the tracks--so, at least for them, the short clips are still a revealing test.
As for an end date, that's a good point. It really depends on the number of "votes". Ideally I'd like to get enough responses to help avoid accusations the sample size is too small. So the more people that respond, the sooner the end date will be. I'm kind of hoping for next week sometime but we'll have to see?