Since I don't have either model, someone will need to correct me if I'm wrong, but...
(1) Yes.
(2) A DAW or other MIDI software should be able to see two MIDI IN and two MIDI OUT ports for the keyboard. Note: I don't know if you need to be using MIDI cables connecting one set of the MIDI IN/OUT ports to an interface in addition to a USB cable, or if the USB cable carries both sets of ports. Anyway, open both MIDI OUT ports in the DAW and you can send 16 channels on each one, 32 in all.