I had a listen to a JPS labs Abyss through a Yggdrasil DAC and both the Ragnarok and GSX MkII amps.
The GSX Mk II was more neutral and exposed more plankton. The Rag was a (very) little sterile.
When listening to fast paced music the Rag seemed to bop along very well.
Listening to the same music through the GSX Mk II, you heard the extra detail in and in-between the notes.
But, here, we are nit-picking. I would be happy with either amp - it's just that I would be more happy with the GSX Mk II.
As ususal YMMV.