Just as mirimir said, it is biological norm to draw line between your own kind and everyone else. For example, both dogs and cats don't kill each other, but dog can easily kill a cat.
Looks like you may want to try Vagga [1]. It is Linux-only, but you said that you want Linux-based environments. It is for development environments by design, so it is way easier to setup than Vagrant. Even if it does not solve your problems (which you have not specified), at least you will spend less time maintaining it.
It just allows to switch between versions and try to hear the difference? I can't hear the difference in the example.
I expected something like UNIX diff, just for audio files. How about actually subtracting one signal from another and displaying where the difference is? Even better if it can detect cuts, difference in speed and so on.