What are three or more theme similarities and differences from the book and movie of The Outsiders?

Since the Francis Ford Coppola film version of
The Outsiders is quite faithful to the novel, there are certainly
more similarities--especially in the themes--than differences to be found. The novel's
primary themes--those of class conflict, loss of innocence, brotherhood, loyalty and
search for one's self--are all evident in the movie. Both the book and film present
vivid looks at the class conflict that arises between the Socs and greasers. The
greasers, especially at the rumble, are very realistic looking young hoods. The loss of
innocence (though it may be argued that none of the boys are innocent) can be seen when
Pony and Johnny are forced to leave town following the death of Bob Sheldon. The theme
of brotherhood is strong in both cases, but particularly in the film which includes a
great cast of future stars (Patrick Swayze, Matt Dillon, Tom Cruise, Rob Lowe, Emilio
Estevez) interacting in ensemble. The movie also deals beautifully with Johnny's and
Pony's search for identity. Perhaps the most glaring difference in the movie is that
Dally (Matt Dillon) has black hair--not blonde as described in the novel. The more
recent DVD release (2005) adds 22 minutes not found in the original film
version.