I'm glad you brought that up, since it's something I've mentally been circling around but never heard verbalized clearly before.

Both the classical and the Yudkowskian system seem to run into some problems that the other avoids, and right now I'm classifying the difference as "too advanced to be relevant to the FAQ". Right now my own opinions are leaning toward believing that under reflective equilibrium my utility function should reference the aggregate utility function and possible be the same as it.