I have both the Trad and the polymer Dixons in Bb. They are both delightful and have beautiful round tone. The brass has that metal-like hollow tone and a little more whistley ‘chiff’. The polymer IMHO has a stronger but more velvet tone- a tiny bit closer to the sound of a recorder. The polymer seems to hit the notes more clearly right away, while the brass might have a bit more flexibility before it lands square on the note.
Both are so much fun to play and I feel are greatly in tune up and down. But…If I had to keep only one, it would be the polymer one, because I love the softer rich ‘old’ sound when I play Early music and medieval etc. However if i played only Irish tunes then probably i’d pick the Trad!
I have the brass Bb and the mouthpiece comes right off so you can use it as sort of a tunable whistle. At least that’s the case with my whistle.
Otherwise Chifmunk said it all.
Ok…received a Dixon all polymer Bb, and it is simply wonderful. Strong bell note, louder than a Generation Bb or a Susato Oriel… it’s exactly what I wanted.