Here's Guo's response to my question about noticeable differences from the different air speed--
The grenaditte flute sounds more like a wooden one, with more deep tone. People who like to play jazz are saying that grenaditte flute gives the same tone as the jazz flutes 100 years ago.
And in case of new voice the sound is more similar to metal flute, its more light so to say,
The response is faster in Grenaditte flute. The keys react more faster
I'm a little curious what "jazz flutes 100 years ago" are--didn't they play concert flutes, same as orchestral flutists?
As for the diff, sounds like the cheaper new voice is what I'll aim for (unless a used metal treble comes up!
) Since I'll be playing it in a quartet with metal flutes, it should blend better than the woodier deeper grenaditte. Of course, by the time I've saved up the money, who knows what'll be available. Maybe Yami or one of the other flute companies will bring back a "real" (meaning metal) treble. Or maybe someone here will stumble across one. Ya just never know do ya?