Closed loop - Any 02 sensor issues?

[justinator]

is there a difference between the AEM module and the ECU master. Is one better than the other. And is there a down side to doing the loop other than removing money from your wallet

I believe they perform equally well. When closed loop was released they quickly ran out of the aem modules and with long waits on getting them back in stock they sourced another option that would work. This is what was explained to me anyway. No downside other than possible failure of the module or sensor which wont leave your sled unusable as the tune defaults to the original mapping but will leave you with an sd24 code constantly flashing on your sled if you dont repair.