possible spoiler
In the book:
- Rogue didn't take the cure
- There was more emphasis on the school after the Phoenix battle(including new students)
- Moria met Magneto at the end while he was playing chess offering help
- The mutants in the sidelines were different than in the movie (limb regrowing guy became lobster guy..etc)
- There was also a scene with Bishop and Charlotte Jones as cops controling the riots
- Pyro was saved from Jean by Iceman (and Iceman lost all his clothes icing up.. it became brittle and broke off)
- A lot more dialogue
- in between scenes where Jean was thinking of her past..about Xavier , and his first students(Jean,Scott,Ororo,Hank)
- Intro scene was about Jean's bestfriend dying activating Jean's abilities in the process
- Shadowcat was little more computer savy
- Beast didn't accept the gov't offer and decided to stay at the mansion as a professor
- Psylocke, Arclight, and Kid omega had less to do but didn't die
- Angel brought his father back home after rescuing hm and had an emotional moment where his father accepted him for who he was and metioned a charter warren drew as a child called archangel, then he went back to the battle saying he was an x-man now and had to help..(brought back pants for Bobby)
- Scott was a lot more appreciated
- Colossus had a lot more to do and to say (including a brief tussle with Juggernaut and Pyro..sort of)
- Ororo thinking about Xavier, Scott, and Jean in the last part of the book, then kitty going to her and talking then they hug (just like one of the promo pics)
- Callisto was stabbed by storm in the heart
- the place where there was a mutant gathering was made to be Valle Soleada?(from X-treme X-men) and the guy there was supposed to be bulky with lots of tatoos
- There was a girl named Alicia Vargas who was also in the X2 book. she went from being the president's body guard in X2 to being Hank's body guard and ultimately the secretary of mutant affairs when hank turned down the offer
- Mentioned magneto's family, with Magda running away from him after Anya (daughter) died.
- Jean enumerated what she had learned from her friends Hank-Laughter and Joy, Ororo- Friendship, Scott-Love, Xavier-Hope, Logan-Passion
- Ororo mentioning her african roots (Xavier and Jean went to her in mt Kilamanjaro) and apparently only Jean knew why Xavier became crippled
- no "I'm the Juggernaut! *****!" line
- no Xavier waking up in Moira's lab
- Apparently when Jean uses her "phoenix" powers, she ampilifies other mutant's powers. then she attacks their physical being using telekinesis (thats why Xavier didn't survive no defense to telekinesis, wolve didn't die due to amplified healing factor