G = better because drumcorps fans generally have preconcived notions they refuse to let go and be introduced to something new.
I noticed thi when i went to see blast II with some corps freinds. I was the only person to have ever played a woodwind and the only one who could get over the woodwind in blastII. woodwinds = bad, but harmonica citar and piano are acceptable alternative instrumentation. they just refused to get over theri preconcived notions of what corps is and blast arising from star, they insited it should be corps, could not accept that it wasnt.
Just get over all your hangups on what corps is supposed to be and have an open mind.
Its not that G or Bb is superior but just gettin over your unwavering definition of what corps is supposed to be. cavie and BD and SCV are still corps and they play Bb!
Don't Tradition and define Drum corps into extinction.