People seem to get "hung up" on the brand name of tweeters, due to either: 1) audio press hoopla 2) the actual superiority of a particular brand of tweeter.
With that said, you must consider that a tweeter is only ONE COMPONENT of many that goes into the manufacture of a completed loudspeaker! Also, some speaker manufacturers highly modify the stock drivers. I have heard several speakers that have phenomenal high frequency response and dazzling transients produced by their tweeters. Yet, the mid-range and/or woofers don't seem to match the performance of the tweeters. Listen to the SPEAKER, not the DRIVERS! The sound should be seamless, from top end to bottom end. Sometimes, you'll find that either the highs, mids, or lows really grab you, leaving the other drivers sounding "left behind". In my opinion, such speakers are not seamless, and this "unbalanced" presentation will soon become tiresome.
With that said, you must consider that a tweeter is only ONE COMPONENT of many that goes into the manufacture of a completed loudspeaker! Also, some speaker manufacturers highly modify the stock drivers. I have heard several speakers that have phenomenal high frequency response and dazzling transients produced by their tweeters. Yet, the mid-range and/or woofers don't seem to match the performance of the tweeters. Listen to the SPEAKER, not the DRIVERS! The sound should be seamless, from top end to bottom end. Sometimes, you'll find that either the highs, mids, or lows really grab you, leaving the other drivers sounding "left behind". In my opinion, such speakers are not seamless, and this "unbalanced" presentation will soon become tiresome.