Which tweeter sounds better?

What fantastic tweeter ????

You should try the compression driver from B&C DE25.It's really awsome with proper horn.Very incisive,strong and delicate.
With the compensation module for frq response,it is flat from 500 to 17K approx,and efficiency is around 97 dB/W/m 2.83V.Without it it is 108dB,but for sono purpose I guess...!!