Although there is some truth to "it varies" - honestly nothing truly beats a pad of paper + a pencil. Even if you want digital copies of your notes, you can always just scan them later.
Technology, while great, will rarely beat this for reliability (battery life, unexpected updates, larger danger to theft and accidental damage, etc.) and speed (taking notes in shorthand and quick diagram / mind map sketches will always be faster with a pencil, even if you can touchtype at 100+wpm like I can).