The Maze Runner: Book vs. Movie

Book	Movie
When he was still inside “The Box”, he already remembered that his name was Thomas.	He didn’t remember his name until his fight with Gally.
The first time Thomas saw Ben was when Ben was undergoing the Changing and was on bed.	The first time Thomas saw him, Ben was with Minho and had just gone out of the maze.
The runners drew the maze on sheets of paper, grouped per section to study them.	There was just a large model of the maze inside the runners’ headquarters.
There were word codes derived from the pattern of the maze.	There were number codes from 1-8 as the maze had eight sections.
Teresa and Thomas could speak telepathically to each other.	There were no telepathic conversations happened.
Min Ho and Thomas tricked the Grievers by making them fall into the Cliff.	There was no Cliff. The Griever was squished by the walls of the maze.
The Gladers were there for two years.	They had been at the Glade for three years.
The Maze was located underground.	It wasn’t underground and was located in the middle of a desert.
There were beetle blades that were used by the Creators to watch the Gladers.	There were no beetle blades shown or mentioned in the film.
The serum was already included in the supplies of the Gladers. They used it for those who got stung by the Grievers and those who were stung would undergo the Changing and remember memories from their past.	The serum only arrived with Teresa. It was first used to Alby.
After Thomas spent a night in the maze, there was a hearing with the Keepers only.	All the Gladers were there when they were deciding what to do with him.
During the hearing, Min Ho suggested to make Thomas the Keeper of the runners.	Min Ho told them to make Thomas a runner.
Gally had undergone the Changing before and saw Thomas in his memories hence, his strong dislike for Thomas.	Gally hadn’t gone the Changing before Thomas arrived. Gladers who got stung before didn’t survive as there was no cure until Teresa arrived with the serum.
The night that the doors of the maze didn’t close anymore, the Grievers started to take one Glader each night.	The grievers attacked and many Gladers died in one night.
Gally threw a knife at Thomas but Chuck got on the way and was killed instead. Thomas hit Gally several times.	Gally had a gun aimed at Thomas but Chuck took the bullet for him. Min Ho threw a spear at Gally.
Initially, a group of boys (including Alby) arrived in the maze and then one boy at a time each month.	Alby was the first Glader and he had to spent living in the Glade alone during his first month.
They rode a bus after they were rescued.	They rode a helicopter and saw the maze from above.

I wasn't able to write all but if you have something to add, feel free to comment below or post what you think about the changes made in the movie.