I’ve done measurements in hotspot, corona, and spill. To my eyes, changes in CCT and duv both look bad. Especially if all three (hotspot, corona, spill) are significantly different.
The reflector/optic used can also make a big difference.
I just measured: 4000k 219c, 4000k 219b, LH351 5000k shaved, 519A domed and 519A shaved.
The domed 519A looked and measured the worst (not bad, but it is in good company).
The 219c and shaved LH351D were in the middle. These look good to me, even being picky on a white wall.
The best were the 219b and 519A shaved. These have very even CCT and duv.
FB