Sorry guys, I was out of town this weekend so didn't have a chance to respond to all the questions.
At this point, the reboot fixes and other outstanding issues are all 100% merged into main CM code, so there should be no difference between the official and unofficial builds (other than the new adreno drivers in mine - which don't seem to matter much right now - probably until we move to a 3.0 kernel).
There was some confusion regarding 4.0.3 and 4.0.4 - I'm not sure why the 3/30 build missed the 4.0.4 build id change, it's possible there was an error in the repo sync that night so it didn't get pulled, but the underlying OS changes were already in place from the day before so really there was no significant change other than the ID being wrong - the base OS changes to 4.0.4 did not go through gerrit, they are just applied.
Hope that answers the questions, this week i'll look at the higher fps boot animation and maybe add that as stock into my builds too. Other than that the only differences between the two sets of builds will be based on the time of the repo sync and build.
I don't intend to provide "support" for these builds, if there's something fun I've cherry picked in I'll post but otherwise, flash away
I like the sound of "cherry picking fun things," especially when I flash new builds every day.