During filming, Phoenix was allowed to improvise on set.  Phoenix lost significant weight for the role and came up with Freddie's awkward gait.  Anderson compared Phoenix's commitment to that of Daniel Day-Lewis for his level of concentration, saying that Phoenix got into character and stayed there for three months.   Anderson considered the dynamic between Hoffman and Phoenix to be central to the film, likening it to the rivalry and differences in style and temperament between tennis players John McEnroe and Björn Borg or Ivan Lendl , with Hoffman playing the more controlled and driven approach of Borg or Lendl.  Adams stated that Anderson would have her appear on set for scenes she was not scheduled to appear in to make her presence felt and at times she didn't know whether the camera was on her. 
2. But you stray from your own line of logic when you define a “simile.” Note that in your own definition of simile you state that it compares two different things, just as a metaphor does. Also note that your definition of metaphor explains that its function–to compare two dissimilar things–makes it a figure of speech. However, the flaw in your explanation occurs when you disallowed a simile to be properly identified also according to its function–to compare two dissimilar things–which makes it also a figure of speech.