In answer to your question - YES
M801 seems to be very similar in spec to the M802 but with 125 watts PEP output compared to 150 watts on the M802 (you won't notice the difference).
Both e & GMDSS variants of M801 have the same level of connectivity as the M802 with regard to Pactor
hook-up, so using it with Airmail software
& Pactor modem
won't be a problem.
Depending which Pactor modem
you buy you will also be able to configure remote
frequency control, either through the modem itself (PTC-II usb & pro) or via separate COM port direct from PC/laptop to radio