The EPROM / ECU / PCM hardware are the same... The wiring to the box is pretty much the same except for various sensor and control wire looms for the SC / SC Clutch / Intercooler, pump etc... The software versions are completely different 2.8 vs 2.8.1 and you will not find one dealer that will be able to install the software for you, because each is VIN specific... And I have yet to find a dealer that has the expertise or willing to break their contract with DC...

If you are installing the SRT6 engine in an auto NA Crossfire, you'll have a much easier time than if you are installing into a manual trans version. But, I must warn you !!! You will not find many software experts or ANY mfg assistance to help you get the engine running, or systems accessories operating properly... In other words, this is a crap shoot...

You will also need to purchase lots of little (expensive) items that are associated with the SRT6 engine...

If you are hell-bent on doing this, I would do a piggy back ECU to operate the engine and keep your ECU to run your systems / accessories... Best price you can expect to pay is about $5,000 from a Bosch Motorsports ECU tech shop in your area...

Good Luck... I'm doing exactly what you are considering, but it's much easier for me because my car is a gutted race car and I don't have any accessories / systems to worry about... So, I'm just installing a full Motec ECU / sensors / harness' to run the engine...