Two HP DesignJet T795 Different Quality

[Sys64738]

We have two of HP DesignJet T795 plotters has same settings, printing by same computer. But one is printing a little more matt than the other. I've got to get the same quality.
What are your suggestions?

[jasonmiamifl]

try to clean all printheads , then do printhead alignment, also color calibration for that poor quality one.

see does it make any differents.

[Sys64738]

clean all printheads , then do printhead alignment, also color calibration done
But there was no change.

[jasonmiamifl]

did you do the color calibration for that media loaded for printing ?

do you use same icc profile & settings  for that media as other better quality printer ?

what else ??    

[Sys64738]

The two t795 are also connected to the same computer. We are printing with the same settings via Photoshop.