Better than the $2,500 LESS expensive KEF Reference 201/2?
http://www.soundstagenetwork.com/measurements/speakers/kef_201-2/
It appears distortion THD is higher on the new KEF Reference-1 than the $2500-cheaper KEF Reference 201/2.
Minimum impedance on the newer Reference-1 is about 3 ohms vs 4 ohms on the older Reference 201/2.
Off-axis response @ 30-75 degrees is also smoother on the older Reference 201/2 than the newer Reference-1.
For on-axis listening window between 200Hz-10kHz, the newer Reference-1 peak @ 86dB @ 200Hz and trough @ 82dB @ 7kHz, which is a 4dB range, sensitivity @ 84dB. So I'm thinking it's more like +/-2dB, which is excellent.
On the older Reference 201/2, it trough @ 82dB @ 900Hz and peak @ 84dB (1kHz-10kHz), which is a 2dB range. So it seems to me the older Reference 201/2 is flatter, sensitivity @ 83dB. So I'm thinking it's more like +/-1dB, which is superb.