Wait, you really don't hear the similarity? To me the two pieces sound uncanny close. The tempo sure, but also the rhythm guitar does almost the same thing, and the higher pitched instruments in both have similar timbre and do similar things. You could probably mix the two pieces together and it'd sound alright.
This happened to me before, I'd point out that for example Reckoning Song and Counting Stars are the same song, but people would swear they have nothing in common. Or Sail vs Believer, why was the second one even made. Is it that people focus mostly on the manner/vibe of a song, and don't notice what it actually sounds like?
I think maybe you can argue that from the 30 second excerpt from the middle of the song (which I guess the model is trained on). The Vapourer briefly drops into the "Arches" theme there, an original tune from one of Spiro's earlier albums which is one of the overlapping tunes in the piece. But I still don't think the similarity is great!
This happened to me before, I'd point out that for example Reckoning Song and Counting Stars are the same song, but people would swear they have nothing in common. Or Sail vs Believer, why was the second one even made. Is it that people focus mostly on the manner/vibe of a song, and don't notice what it actually sounds like?