I guess I am the only one not using the whole system.
We have e-max (Press; ZirPress) and the cad/cam version (ZirCAD; CAD)
Ivoclar offers also e-max Ceram porcelain layer system.
I just use the e-max Press and e-max ZirPress with my old Zr. porcelain and no problem also acording to Ivoclar.
You can use all ceramics that fit to Zirconium with WAK around 9 - this was also the idea not to change the ceramics when layering Press an Zr. The same goes for e-max Ceram (also for Press and Zr.)
From my experience I would just recommend using slower cooling down phase especially on the final run.
E-max Ceram has final bake around 700 - 720C, so if you have on your Porcelain a higher temp. just give it 2 minutes more time to cool it down.
About the name - just say e-max Press