Quote Originally Posted by Intropy View Post
I would resist the urge to reduce the differences to a bullet-point list. But if you must, there are some things the stock ECU can likely never do, such as on-board logging, real O2 feedback (not open/closed loop), P&H and staged injection (you mentioned meth), real boost control, etc. Everything else is a grey area to me. Obviously the stock ECU does things like knock control, accel fuel, DFCO, etc. How configurable these are compared to the AEM is something you'd have to ask Greg or someone else in the know.
While I agree (and stated earlier) that the learning curve for using both devices is about the same and just a matter of opinion, there's some mis-info with the features of the stock ECU.

On-board logging - the tactrix 2.0 cable does have this feature and uses the same type of sim card found in almost all modern android phones
Real 02 feedback = short and long term fuel trims. Everyone knows about this feature....
meth injection - yes it can. I'm working on that now.
real boost control - read my chromed ECU thread. V1.1 is setup to be boost based instead of airflow based boost control. However, after playing with both for some time now, I'll even argue that airflow based boost control (setup like this from the factory) is better as you get more "consistent" WHP based on the geography you're driving in...