You should see how the Maggie LRS fared on a similar test of AudioScienceReview.Quite sure it was the Sumit.
Bt any dipole speaker, ESL, planar magnetic, row of cones, etc. would fare poorly on the spinorama.
That device is designed for monopole speakers and is a great tool, but like any tool, can be miss-applied.
Not at the same level as mid-sized MLs, but dipoles and spinorama-type measurements don't see eye-to-eye