It's personal preference. Nothing more. Some will like and some will dislike. It's the same with any brand of speakers.
The Klipsch KL650-THX has a listening window of +/-1dB (AH and HTM), which is better than just about any speaker out there, except the NHT Absolute Zero, which is also about +/-1dB (HTM), but +/-3dB (S+V). The KL650 is also THX Ultra2 certified, which means it has smooth off-axis response.
But measurements are not everything, especially from just a single 3rd party. Let's wait for another source like AH or Stereophile.
One person's opinion about the Bryston sounding better than anything else is just personal opinion, nothing more.