I’ve had the chance to play a Bryan Byrne and a Terry McGee copy of a medium-holed Rudall side by side. While I am new to Irish flutes, I have played the baroque flute for 15 years, so am used to wooden flutes.
The Byrne was made in '98, the McGee was new. The Byrne has a fully lined head, and was noticeably heavier to hold than the McGee, which has a partially lined head. The Byrne had a slightly smaller outside diameter, but both flutes looked slender and elegant. The Bryne has smoothed finger holes, the McGee doesn’t. Neither flute had a significant amount of undercutting, but the McGee had more on the right hand holes. Hole sizes and positioning were very similar, but they weren’t identical. Overall, fit and finish on both flutes were better than my baroque flutes, bought in the early to mid 90’s.
The Byrne has a standard elliptical embouchure, whereas the McGee had a modern embouchure. Many of the differences pointed out below may reflect the difference in the embouchure, so the comparision below might have been different if both flutes had the same embouchure.
I found both flutes economical on air, and to be much louder than my baroque flutes, but not loud in an absolute sense. The McGee was more free blowing, and the Byrne had more resistance-a more focussed airstream was needed to make it sing.
Both had good tuning as measured on an electronic tuner, and could be easily played perfectly in tune with minor adjustments, but the McGee was better. The McGee also had more uniform tone on each note than the Byrne (fewer closed sounding notes), and the notes at the extremes of the range were easier to get. Both played to the A in the 3rd octave using standard fingerings. It took me a while to find the most in tune fingering for C#, c and c# on the Byrne. I am still looking for the bottom D on the Byrne, although I get it occasionally, and once I really nailed it, and it was impressive.
I found I could get a wider variation of tone colour on the Byrne, from creamy and round to focused and reedy. I found its basic tone to have an excellent centre, clear, and penetrating, and one had to work a little to get edge. The basic tone of the McGee was warmer, had more edge, and less centre, and I found it harder to get reedier sounds, and really focussed sounds. My wife (no musical training, doesn’t play or sing) preferred the sound of the McGee, commenting on its warmth and woodier sound. I found it easier to get chiff, honk, and emphasis, and to make the tune swing on the Byrne.
I am not very good at playing rolls and other ornaments yet, but nevertheless found the Byrne to be more nimble and agile than the McGee.
In summary, I found the McGee to be play more uniformly, like a modern instrument, but it took me longer to figure out how to make it play its best, and I expect it would take me a while to get more varied tone colours. I am sure they are there, but I didn’t find them as easily. I found that the Byrne is more like a baroque flute, but more responsive, and I was making it sing and get very different tone colours in a few minutes.
Of course, everything above is one person’s experience. YMMV. I am sure that I am far from getting the best out of either flute. No one reading this should assume that my comments are authoritative.
Hugh