I was waiting fir someone else to reply that may have thrown more Falks than me. I test threw a mint green K1 first run last fall. It had more glide and a little less stability than the glow.
Thrown flat, the mint would turn gently then flatten out with the fade not kicking in to the end of the flight.
It had more glide than any Valk I have seen, and more distance. The flight path was similar to an Inertia, but slower.
The glow is pretty darn straight but with more fade and less glide...as per most glow molds. I would say somewhere in between a Valk and a Volt.
Take notice that I have never thrown both back to back, so my memory could not be perfect.