I own both. Susvara is more airy, more precise, has more space. It is a far more polite sound.
Valkyria, oh my, It's more muscular, sensual, physical, with more body, more punch, more slam, and a lot easier to drive.
Valkyria, oh my, It's more muscular, sensual, physical, with more body, more punch, more slam, and a lot easier to drive.