I just went through the service manual and didn't see anything regarding head voltage. Since this is something normally input during installation, I doubt the voltage changes by ink type.
What broght this to my notice was that from the MSDS the components of Mimakis ES,HS and SS21 are diffrent. To get the best of of these components one might, in a superwide enviroment, change the voltages/waveform to the head and I wondered if the same was true for wide, especially as on installation the startup procedure asks you to choose which ink type you intend to use.