Can’t talk to Susvara (personally not a fan of the presentation - never made an emotional connection), I included a SolP and Elite comparison in
my review here, which may be of interest.
That review is spot on for my impressions too.
I personally wouldn't trade the SolP for Elites but enjoying Elites nevertheless for their musicality and timbre, playing every genre with ease, better suited for bad recordings like some older metal and can be even easier driven by DAPs (but likes better amplification as discussed before)
Have to say though that I am enjoying things like my Chill hop Playlist more on SolP as it's tighter and more spatial.
Am experiencing the spatial qualities of Holo Spring 3 more on SolP whereas on Elite the difference between direct output of my HA200 or Spring 3 over HA200 isn't as striking (positioning of instruments is more diffuse in direct comparison to SolP).
Have to say though that SolP is a master of instrument seperation and pinpoint localization and in that regards trumping even Susvara which has a nice stage but not as much pinpoint holografy as SolP imho.
I'd say Susvara is more musical than SolP and slightly more textured but missing bass amount satisfaction for my taste.
I've got rid of Susvara hesitantly though
From its tonality SolP bass is more dry TC like (though cannot reach TC amount) and Elites bass tonality is more leaning towards warm and soft in direct comparison - I personally prefer dry and hard.
As usual an ideal headphone would be a mix of all with the tight dry bass from SolP and its spatial qualities, Elites timbre and comfort and Susvaras effortless textured detail and treble extension.
Another thing worth to be mentioned is need for equing.
I personally put on the ultra wide pads onto the SolPs which are opening up the upper registers and leading to a more Susvara like open presentation (though won't reach Susvaras presentation there fully), mids are still quite recessed compared to Harman target.
I am bumping those.
Bass usually doesn't need eq but is also recessed due to the ultra wide pads and can need some increase to compensate (or loudness on my HA200).
On Susvaras I ve tried PEQ for bass shelves too once I had them as the stock bass amount didn't satisfy me.
With Elites I can play straight stock without need for equing (loudness for some more fun).
So I can play straight Apple Music without always looking for a Roon source which I can equ.
That's a great advantage over the mentioned other TOTLs imho.
As usual all a personal view...