Not always. 25kHz "wide NFM" is still common where licences have been grandfathered in, but 12.5kHz "narrow NFM" is becoming more common.

12.5k NFM has the same signal bandwidth as a timesliced (dual timeslot -- two virtual channels per physical RF channel) DMR or APCO P25 signal.

Instantaneous use is the same but channel management does probably make P25 more efficient for a bunch of departments to independently operate in limited spectrum.