It depends on whether the radio software will be shared or not (the only phone specific proprietaries). On Moto X there is single modem firmware for all versions, and that works with Droid MAXX as well.
sending 'modem' (48324 KB)... OKAY [ 3.996s]
writing 'modem'... OKAY [ 12.326s]
Symlinks and permissions...
set_perm: some changes failed
E:Error in /tmp/sideload/package.zip
(Status 7)
Installation aborted.
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