After looking at the second Datasheet the only different I am seeing is that it is dated April 13, 2016; and no revision version number.
After looking into this further.
Flex has added a Maestro Quick Start Guide version 1.0 on the next download.
Other than the bare basics to get a "Quick Start" I'd guess you will need to wait for the full manuals (Hardware & Software SmartSDR 1.7.xx) to have the feature set enumerated.
Wonder if the QSG is as much a place to put all the regulatory boilerplate a product really should ship with as anything else?