Well the subject of newer P3P/A vs older models looks to me is not limited to the newer (2312A) vs older (2312) motors, having in turn too different ESC boards (part 33 for old motors, part 96 for the new motors, new motors don't run well at high throttle if used with the old ESC board), but there are differences in terms of the Tx pwr of both the AC & RC.
Namely, DJI has licensed at FCC not just the P3P W323 1503 that provides an AC with Tx 0.745 Watts and an RC with Tx of 0.380 Watts (both GL300A & B), but has 2 lower Tx powered models W323 1507 with AC Tx 0.612 Watts, or even lower power as W323 1510 with just AC Tx 0.520 Watts. What I've noticed searching here on the European market, the W323 1510 comes with the RC GL300C, which has just Tx 0.303 Watts, lower that the above mentioned 300A & B.
The same applies for P3A W322 1503 (AC Tx 0.729 Watts), 1507 (AC Tx 0.630 Watts), 1510 (AC Tx 0.550 Watts).
So, since DJI production for P3P/A was stopped, pilots that buy now their P3 from what the dealers market still has to offer from stock, should ask for the 1503 model with RC 300A or B. All rest of combinations have lower Tx power, impacting directly to the fly distance before signal loss, especially in the urban area.
Be happy if you own a state of art 1503 model P3P or P3A !