Do the presses have the same ink key widths? Do they both have a spectrophotometer with automatic closed-loop key adjustment?
My employer installed a new sheet-fed press a while ago with 35mm keys that required a different colorbar than our existing sheet-fed press with 30.75mm keys. Both presses are Komori, but use different data formats for the colorbar description. We had the data files in each format for the two different colorbars, and it sort of worked to use a colorbar for one press on the other press, but wasn't ideal because many of the keys don't end up with all the necessary patches in them when one press uses the other's colorbar. That breaks the closed-loop adjustment system. So we used different colorbars for each press, which caused a lot of extra re-ripping (and occasional replating) due to last minute press changes caused by scheduling pressures.
To solve the problem, I developed a hybrid colorbar based on the metrics of both presses, whereby there is a patch break on every ink key break for both presses (preventing any patch from straddling two keys for either press), and whereby each key for each press has all the necessary patches. The colorbar ends up looking somewhat random, and it requires the data format for the colorbar to allow for patches to be of varying widths, and in most cases would require the ability to designate "invalid" patches, which are often used to put a non-solid target inline with the colorbar (such as a star or slur target).
If you identify the data files that each press uses to know what colorbar it is reading and send them to me (I don't mean EPS, PDF, etc. files that are used to RIP the colorbars), I might be able to infer the applicability of the same process to your problem.
