By the way, great collection of tracks for comparisons - lots of variety in the sounds in the tracks.
From Tidal, through Topping D50 into a CTH amp
"Jesus, etc"
The song seems to me to not have a very wide dynamic range... Hence the three headphones sounded somewhat similar. The 6XX was more "muted" / laid back than the 58X or 660S but the difference was not that great. The 58X was a bit brighter / clearer than the 660S, but the 660S felt more relaxing (how is that for a terrible term to describe audio!!) or "musical" without being as laid back / lackluster as the 6XX.
Not enough difference to declare a clear winner, but maybe the 58X takes it by a nose...
"With a little help from my friends remix"
Sounded great on both the 58X and 660S. 58X is brighter than the 660S, making it sound more detailed, a sound signature that just appeals to me. Both did nicely with the highs in the male vocals. Not a lot of bass in this track to compare any difference in the impact and extension.
Also sounded good out of the 6XX, but there is just... less... overall sound (yes, I tried volume matching, of course
) The vocals sounded nice, but what little bass is there in the track just was not as present, and the highs from the ocals did not get as high as on the 660S and especially the 58X.
I liked the 58X much better on this track.
"Encontros e Despedidas"
The 6XX has a very relaxing sound... very musical... almost put me to sleep it was so relaxing.
58X - much more exciting sound even though the overall track is very relaxed. Wait are those cymbals I here in the background? I did not hear that on the 6XX (well, I did, but definitely not prominently). These cans definitely revealed much more in the track than the 6XX. But I would not try to take a nap listening to this track with the 58X
660S was more similar to the 6XX. More laid back. There was "more" sound (like the 58X I could hear more of the instruments), but it was more laid back. For example, I now there are cymbals in teh background, but they are nowhere as prominent as on the 58X. Also the female vocal was much less bright than on the 58X
I liked the 58X on this track much better.
"Time Check"
OK, now we are moving!! Let's see how these babies do with a super fast and highly dynamic track!!
660S kept right up with the music! The horns sound great, clearly singing out. Drums had impact. Really engaging sound. This will be tough to beat!
But then I switched to the 58X, and... more of everything! More prominent horns. You can feel the drums, hear the cymbals (which were a bit lost on the 660S when they weren't the prominent instrument). Both the 660S and the 58X had no trouble keeping up in my opinion with the pace of the music.
And the 6XX was there with the sound I think you expected me to describe. The instruments were all there, but the highs not as high, the drums there but lacking some of the impact. Again, laid back.
On both the 660S and the 58X I fell that every instrument and note has separation, while on the 6XX some sounds seemed to just melt together (hence I think the term musical)
Both 660S and 58X were good, but I give the no to the 58X for the clearer presentation.
"The Tourist"
I am going to come across as a broken record, but many of the same comments from above apply...
The 6XX had a very relaxed sound, certainly reflecting the relaxed signature and intent of the track. Not much to test in terms of dynamic range or speed. A nice relaxed sound.
58X a bit brighter, with the highs of the vocals shining through a bit more than the 6XX. There just isn't that much in this track that challenges the 58X to shine, so it is really close to the other two.
660S in terms of warmth/brightness in between the 58X and 6XX as in the other tracks.
In this particular track, I think I like warmth more than brightness the 58X does not do as well, and with its more full sound and extended bass and treble than the 6XX I prefer the 660S on this track.
In summary, I liked the 58X clearly on 3 of 5, the 660S on 1 of 5, and a pretty close tie on 1 of 5.
But, again, that is just me, and that is just me at this instant. YMMV!!