I wonder if any response graphs have been released? If so it might give a fair idea of how they sound, since finding a way to hear them is difficult. The smoothest response out there is the Chorus II. The Forte one has a lot of fans but you can surmise that it is because of the substantial dip in 1000hz-2000hz region. Also the sharp downward slope at 10k. Others find them less 'Klipsch' sounding.
My guess is that they have gone for a smooth response in the Forte III.
My guess is that they have gone for a smooth response in the Forte III.