VC: king of bass, lush sound throughout audible range, you will miss many subtleties of any recording due to Lush presentation and extension into what should be separation between sounds. Very pleasant experience but warm warm warm on bass.
Rognir: VC lite, less bass but more of the recording revealed, more natural timbre, but less natural fidelity in mids and vocals, can tell an off-normal coloration here
Stealth: Less bass than above two, but of all most accurate bass (each note has strum, rise and decay, rather than lush or bloom or shortened single note feel), mids and vocals extremely natural and most accurate to music/voice in a room, treble is fast and accurate and well defined but never harsh or fatiguing. NOT A BASS HEAD CAN. If you are not willing to EQ and you are going to feel like you don’t get the warm ness of a VC, but it can be added back.
Stellia: impactful throughout whole audible range, MUCH more treble centric/bright than others above, to my ear a tuning aimed at airiness and energy but ultimately fatiguing, neither bass lush nor easy to listen to nor accurate IMO.