What where the main differences between the '71 and '72 Demon?

I have both and I see so many little differences. I prefer the 72 but the only downside I see with 72 is the last year for a rally dash was 71. In 72, even a 340 car was not available with the rally dash.

The standard dash frames are the same for 71 and 72. Only the dash clusters were different because 72 had the seat belt buzzer as a federally mandated add on which the 71 didn't have.