Which is better, Clark or flying knife whistle?

Clark is great! I have blown all three brands: Clark, Flying Knife and Generation ~

Personally, I think Clark is the best ~ flying knives are better than the first generation, but they are not as good as Clark ~

Clark's flutes are pure in sound quality, especially "Meg", "Celtic" and "Sweet Tone" to "Tradition" and "Victoria" (these two styles are actually the same, but one is black and the other is tin), but they are a bit hazy and vivid, such as "Meg", "Celtic" and "Sweet Tone" and "Tradition" just like a piece.

But the flying knife and the generation, especially the generation, have serious noise and impure sound quality ~ Although some people like this impure sound, I personally hate it ~ And some voices are not accurate, and I can't adjust my breath to correct it ~

When I often play Clark in the dormitory, the whole dormitory has no objection and feels very good ~ every time I play for several generations, my roommate says that the sound quality is very poor, which is simply noise, and tells me to either stop playing or play Clark ~