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!

The only two guys I am aware of that could more than likely give you the correct answer to the bias rate the two brake packages you are talking about are Dr Diff -aka Cass-, and AndyF.

It sounds like you are already aware that using an adjustable proportioning valve is generally only a band-aid for mis-matched front and rear brake components.