Tone of both worlds is really similar: ruthless corpos (assasinations of competition), corrupted police, dystopian future, crime going wild, etc.
Yet there are differences.
For example in Ghost in the Shell, unless you talk about the real life film adaptation, the police isn't really that wide spread corrupt. But there certainly are agencies going after corruption... and even the real world adaptation the reasoning for the police hiding true identity could be explained by non-corrupt means.
In Ghost in the Shell there's not really this idea of corporations being evil systems that brainwash people to accept their godly powers, and where average humans are just left to rot and barely making by. I think this is generally something that seems to however appear in a lot of american cyberpunk themed movies and books. Not saying t his is good or bad thing, just an observation.
In Robocop/Terminator for example there's not really a dystopian future going on, in new or old ones, there's certainly a giant military corporations pushing the boundaries and trying to get their agenda through by any means necessary, but most of the powers are still run by politicians and their decisions. The world in robocop isn't all large mountains of trash everywhere surrounded by people wearing broken gadgets. It's a typical American life being attempted to live in middle class families, while there certainly are (especially in the old movies) a large criminal world which needs to get solved. Outside of course the bleak future of Terminator that we get shown this post apocalyptic world of robots taking over the earth and wiping out humanity.
So I don't think there can be any large similarity to be drawn from any particular characteristic. It's entirely normal to assume in future there are big corporations that do business, and there is some level of attempting to gain advantage by lobbying with politicians and trying to gain contracts etc. In Ghost in the Shell however (looking at the movies alone) there's more focus on the AI and humanity than what corporations are doing.
Cyberpunk is just like a fantasy. You can write a book about a ring of power that is destined to rule all of middle earth, or you can write about a boy who is destined to beat a great evil Wizard. Or you can write a story about Dark Elf trying to adapt into the outside world after being raised in the underworld to be fierce and ruthless fighter and serve the will of the dark elf Goddess. Or a fantasy book series about King Arthus and his wizard friend Merlin, who try to rule over the land of Camelot.
There's not really 1 specific quality that would unify all the fantasy books, other than that there's generally some type of magic and there's character learning to deal with his/her powers.