Same Size Rotors Front and Rear?

Hi everyone, I’m installing an HDK suspension in my Duster and am using 13” 99-04 Cobra brakes on the front. So my question is, would it hurt anything to use the 13” ‘15-17 Mustang GT rear brakes on the back? The 2 piston front calipers would obviously be bigger/stronger calipers than the single piston rear calipers, so would that be enough to keep the proper front/rear brake bias or would the added leverage of the larger rear rotors have enough of an impact to mess with the bias?
From my interweb searchings, I’ve found that apparently some new 06-11 police Chargers run same size 12.6” rotors front and rear with the fronts only being thicker. So I’m thinking the 13” front and rear should be fine, I just wanted to hear the opinions of people who probably know more than myself.
Thanks in advance!