I don't think many people on this forum would have 3 AE111 computers and a dyno to do tests. Any will work. The differences would be very marginal.
Most of the differences you get in a conversion are to do with hooking everything up. Many people are happy to do half the job and drive around with no air temp sensor and things like that. The actualy ecu differences would be small. But I am guessing.
I wonder how the ecu knows what gear your in to change the rev limit? Thats something I would look into.