the BX2 and the 10.1 are really quite different speakers, hard to make a comparison like for like. one has two rear ports the other front ported, different tweeter material, different driver material, different driver size, different shape, different cabinet volume, the BX is a bit bigger, different sensitivity, different frequency response, different nominal impedance, different crossover frequency.
I do like both speakers........and for what it's worth I don't find any harshness in the C Cam gold dome tweeter.