Boy's, you need to think laterally on this.
The same timing and the same A/F ratio will make the same power, doesn't matter what ECU you are using.
I used an Autronic for 2.5 years on my Sti and I loved it because it plugged straight in. I'm using a PFC Pro on my R32 purely because it's a plug in solution. Both will make the same power numbers on the same car.
What you pay for with Autronic/MOTEC is the race car options that none of us will even go close to using the way the maker intended.
Don't just buy an ECU, invest in a proven and reputable engine tuner - an ECU is just a conduit for a tuner's engine strategy.
Regards
Andrew