Datacolor User to User Support Group.

What would you consider the same standard?

For LCDs 2.2/Native is a standard I believe. Therefore if Native white
point is different on two monitors then your colors are different.
They are accurately described in the generated profiles that are used
by colormanagement-aware software but they visually look different on
monitors. Then there's black and white luminances that are also different.

And with a colorimeter you can measure it, print it out, compare. You
see the whole thing. 

The idea of matching (AFAIK) is to make two monitors colors look as
close as possible to a colorimeter. Calibration, on the other hand,
tries to match the target values and then creates an accurate
description (ICC profile). In the case of "native" wp there's no
target value to speak of.