No, the control medal is far more than a CPU. It is also an operating system that handles and regulates the bio-boost systems, as well as handles recording the data of the host for healing and the self defense systems. That much has been noted officially (included the VDF page regarding it). The regulation of the bio-boost system is also why there is a significant difference between Humans wearing the armor, and the creators wearing the armor, and why even they believed that it could get much worse.
The problem is that we have only seen humans as Guyvers, but we do know that creators say that the humans get more than 10 times the boost from the unit.
The Zoacrystals on the other hand, HAVE been proven to be essentially batteries. Zoa-forms have their abilities hard wired into their DNA, but cannot use them without energy. This is why things like the Libertus and Griselda require to be recharged in tubes if they overuse their powers, and why Carleon did not die and aged terribly after his crystal was removed. As well we have had Zoalords require rest or being placed in a bio-tube after over exerting themselves. The crystals don't seem to be able to regenerate power quickly.
So if a unit bio-boosted on a Zoalord, it would not bio-boost exactly same way it does on a human and would likely adjust it levels and abilities for the new organism it just merged with. If the new organism can handle more energy, it is fair to say that the Unit could pull more energy quicker.