ROOSKIE
Major Contributor
I don't know why.Notice that they used different measurement axes for the two speakers (why?). The original was measured at the tweeter axis, while the K2 was measured with the axis between the tweeter and midwoofer.
The speakers may have a different crossover design axis and they were informed by Focal or they just measured differently.
They are 2meters away in the NRC chamber so I think the variation won't be huge at that distance, still it may be a factor in terms of apples to apples.