Believe me, I was born and lived there 34 years.
The Wing Fighter sells like "fresh" bread in a hunger zone. That Grozer bows win, may be true for the Netherlands, but is not the case in Southern Germany. I shoot traditional for 20 years and know what I do and what I can recommend. Do you know, why Blacky never got a bow from Grozer for testing? If they were this good, he would have sent some long ago. I also e-mailed him directly to discuss performance of his creations, compared to other composite bow designs. I never even got an answer, besides that he said: The values can not be reached with his designs.
This is the same useless discussion as on FC and FA, the german forums. If you get 180 fps with 28" draw, then this is below average, when I get that with a 25.5 draw.
If you shoot as good as a longbow depends on the shoot and the obstacles you're facing. In tight situations the Hwarang will outperfom the longbows, because they can be held correctly in nearly all situations. In open shot situations, longer distances, the longbow has accuracy advantages due to the lower string angle.
If you read statements about fast horsebows, the arrow weight is usually a joke, or the draw length is far beyond 28". In all "horsebow" test in the TB, not once there was a scientific performance test of the featured horsebows.