2005 hemi ecu

Greetings from NE FL!:greetings10: I have an '03 1500 QC 4wd with 545rfe and I'm about to embark on the '05 ECU swap endeavor. I found an ECU and harnesses (under dash, firewall to headlights, trans) from an '05 1500 QC 4wd with 545rfe and I'm wondering how many of the harnesses are the same...