I wonder how Samsung’s are very thin and still have a flush camera? Or pretty close to flush anyway.
They are taller and afaik Apple's vibration motor also takes more space. You can look at how the internals of either phone are laid out in a vastly different way from iFixit teardowns. iPhone X also uses a dual cell battery while Samsung uses a single one. I don't know why Apple does it like that considering they don't seem to have any battery capacity advantage.