If there is more than one, then its multiple
Um... APCO25, P25, ASTRO25 = same thing (different names).
No one uses MODAT anymore...that has been essentially dead since the MX radios. It was carried over to the Astro Saber (only) for LAPD and that too died when they went to digital.
DMR/TRBO wasn't initally meant for public safety. Same with LTR. Some places bought into it due to cost, but its still in the very minority of users overall (in public safety).
FWIW, APX was to have TRBO support (as stated by some Moto people a couple of years ago) but I doubt that would happen.
My APX has a capcity of 2000 . How many more channels do you really need?