Hi Maru,
Just wondering if there's an update on this? I think I've discovered what the difference in the values is.
The temperature in Corona 8's VFB appear to be outputting values using linear colour space, and the old VFB version was outputting the same numbers, but in gamma corrected sRGB. CoronaColor still outputs in sRGB for temperature values.
It would be great if this could be corrected (whatever way that is haha, not sure which is more physically accurate) in the first hotfix. I'm doing some work for a client that requires relatively high colour accuracy, but guess I'll roll back to 7 until this is sorted.