According to the BGC game, there are "cheap, dog-brained robots" and androids who "are only identifiable by dissection". This, plus the section detailing the two basic "grades" of boomer brain, suggests that Logan may have the right of it -- two different "chassis" for the two different grades.
-- Bob
---------
Then the horns kicked in...
...and my shoes began to squeak.
-- Bob
---------
Then the horns kicked in...
...and my shoes began to squeak.