How to get P5000 Epson proofer prints to match each other

[Kusmier]

I have three Epson P5000 printers and they all pass G7 and ISO calibration (low Delta E) every week using a P2P chart and reading with Print Verifier. I have printed a test page to all three printers I notice subtle differences. For instance, one print might be a touch warmer and another may have a little more yellow. Is this okay or is there something I should do to have the prints match better?

 

[SteveSuffRIT]

Tolerances are bi-directional.
It's not + or -, it's + & -.
So, you can be a dE = 2.0 one way (warmer) and a dE = 2.0 the other way (cooler), both in tolerance, but when compared them to each other, it's a TOTAL dE = 4.0, out of tolerance.
For example, at the butt edge of a folding carton or bottle label glue seam or the common header of a crossover page in a magazine.
Hue errors (h') are much more sensitive visually than light/dark (L*) or clean/dirty (C*) errors.

 

[Kusmier]

Thank you for the explanation, that makes sense.