Steve, I looked into this a bita couple years back. It looks the same now. The AEM is a full engine management solution. The unichip is much more of a fuel/inigtion computer. I think it would be a good option for a BPU level of mods. Can you tell us what dyno results your friend achieved? What was the cost of the unit? Did it plug into the stock harness or did it have to be spliced in? On what basis do you claim it replaces a BCC? I'm assuming your friend still runs a boost controller, right?