The manual for the legacy warthog usually calls these VHF 1/2 and UHF,
or VHF AM/FM and UHF. The AM/FM nomenclature is what I usually hear
people call them and it's clearer, so go with that.
For the A-10C II, that manual hasn't been updated for the AN/ARC-210
yet, so I'm not really sure what that ought to be called. The UFC calls
it COM 1 though, so I went with that. The alternative would be something
like VHF/UHF for the 210 and UHF for the 164, but I don't know if that's
actually better. Could be completely explicit and call them by their
full names, but that's probably less clear to people that aren't
fiddling with the radio implementation constantly (and even I confuse
the 164 and the 186 all the damn time).
The latest DCS update both added support for preset radios (two both
A-10C modules!), and re-ordered the legacy A-10C's radios so we can use
the VHF radio for intra-flight.
After this patch, the legacy A-10C will use VHF for intra-flight, the
new module will use one AN/ARC-210 for intra-flight and the other for
inter-flight comms, and both modules will have preset channels assigned.