Only now, after we’ve been discussing this for days, I am sort of half remembering that when the Ecodear range came out the 48B was described somewhere as for ensemble playing and the 402B for solo playing. (Aside: bit pretentious for a plastic recorder!). Anyway, I think Ken is on the right track because all those European music schools, of which there are many in Germany, will perhaps want instruments for ensemble playing, which are a couple of Euros less. Non of this matters. It’s how well you play it that matters.
Descant and treble recorders.