This setup allows 64 channels on each radio. Control head - The button programming is the same between both the primary and secondary radios. For instance, on the top row, you cannot set it up for. DTMF, Scan, DVP etc on one, and then Call, Page, Scan for the secondary radio. It's the same for both radios.
MUTE is optional, but it very handy.
Everything function wise, is the same. If you hit scan, it will only scan one radio, unless you select the other radio, and scan on the other one as well. The display names will still show the name of the channel that it is receiving on scan, even if both are scanning. We are not sure what priority is given to the names that are displayed. It seems random which one will display first.