Gamry’s bipotentiostat setup is simply the best possible bipotentiostat for rotating ring-disc or scanning electrochemical microscopy experiments. The two channels in a Gamry bipotentiostat are two fully-functional potentiostats whose timing has been synchronized. This means that in addition to acting as a bipotentiostat you also have two fully independent potentiostats that can be separated when the need arises. With two channels, you can double your research output, unlike conventional bipotentiostats.
With this kind of flexibility you can mix Gamry potentiostats of the same type.