Sultan and Khan Bass:
Lets start with Glory Box by John Martin (I sure love his 3rd through 6th albums and some stuff before and after that). A very simple analogy is that for this song the Sultan does to the Khan what Legend X does to the Sultan. The Sultan has such a deeper bass on that song compared to the Khan. They both do the song well but very different. The Sultan does the treble vocals and bass equally and impactful. The Sultan does it in an enveloping 3D way. The Khan has a more exact BA type of bass. The vocals are a little behind the bass and treble with the Khan.
Take the song Teardrops by Avishai Cohen (amazing trumpet player) and Big Vicious. The song starts with just kick drum and cymbals. The Sultan and Khan are almost indistinguishable. The Khan bass is quicker though. Super quick decay. The Sultan has a slower decay and slightly more pronounced sub bass. Then when the guitar and then trumpet start the difference is more prevalent due to the more forward thicker mids of the Sultan.
And finally Get Lucky by Daft Punk. Bass is minimally more impactful with Sultan. Khan is as I stated above slightly quicker. They both do that song so well. Once again the difference in more forward and thicker mids come out with Sultan with the guitar and vocals. Khan is more intimate overall. Sultan has a bigger stage. The timbre is different. Thin and intimate for the Khan and thicker and larger for the Sultan.
OK I cannot help myself. The first 16 seconds of Dreams by those Fleetwood Mac people
is all cymbals and bass. Again both IEMs sound great. The difference is so obvious with quicker tighter very present bass and treble on the Khan and slower, deeper and more layered bass and treble on the Sultan. Intimate vs. grandiose in a nutshell.