This movie is basically the plot of the original, but instead of the opening scene they basically use the the hostage situation from the first episode of SAC, but only use the Major, instead of the whole team. Puppet Master is replaced by Kuze from 2nd Gig, who instead of being a pacifistic hermit like Kuze (TV) or trying for asylum like Tits McTorso, he instead on a roaring Rampage of Revenge TM. The Foreign Ministry is replaced by Hanma, goon squads and all, and they created the major a year before the movie begins. They perfect their robots by abducting anti-tech hippies runaways and erasing their memories and seeing if they mesh with their new robo-bodies. They then lend these robots out to the government, while still owning them. Thus Japanese hippy Mokoto Kusanagi becomes white-girl Major Mira Killian. I don't know how you can be a Major when you're not part of the armed services and are instead on loan from a private entity, but whatever. Hanma orders all section 9 wiped out. Aramaki kills like six people, and guns down the main Hanma rep who is remotely piloting the Tachikoma (which is actually a really solid set piece scene). Oh and instead of doing something subtle to the garbage truck drivers by messing with their memories, Kuze just directly controls them and makes the ram the truck into the car of one of the scientists who made him. They still have the scnee where they interrogate the guy afterwards, complete with non-photograph, but it lacks the set up as they were talking about takeout before they went all "Assuming Direct Control". And at the end only Kuze gets headshotted by the Helo snipers, and the Major just walks away with Batou.
Some character stuff: Batou is mostly human, only has an artificial arm, but over the story gets exploded and needs new eyes. Ishikawa is Black now and has a roibo liver for better drinking (I think that's his only line). Togusa is still Asian but speaks English, unlike the chief. Paz is now an English girl. And Borma is there, apparently, since the shots all have the right number of people but damned if he does anything. Oh and the major can swim fully using only flippers despite being made of metal.