Hmmm. . .good question. The Gallo tweeters are extended to the point where I felt I could sense treble information above where my hearing is rolled off. The voicing of the speaker takes advantage of the superior tweeter by not rolling it off one bit and the tweeter takes center stage. Usually this is bad, but not with these speaks.
They have excellent pitch definition. Listening to drum kits, it was always immediately obvious which cymbal was being struck. Multiple crashes were accompanied by convincing visualization of the relative sizes of the brass.
And, the excellence of the tweeter is a big part of the Gallos' ability to soundstage and disappear in a room. These elements were far superior to any other speaker I've heard. And, its size (big) means that it pushes more air than usual, giving more meat to the soundwave. It's like the difference between a 6" and a 10" woofer.
But, I've decided these skills are ultimately not that important to musical conviction. Audiophiles put "imaging" and "soundstaging" on a pedestal that in my mind is unwarranted. To me, rhythmic drive, dynamics, and tone are far more important. I've really only found these traits optimized with higher efficiency speakers. And, the breath and life of music is in the midband, not in the highs or lows. If you don't have that right, don't even bother with the rest.