Re: Samsung Galaxy Note
I always saw Wacom as the chief forebear of stylus support on the iPad (especially the company Modbook who would take your MacBook and modify it by adding a Wacom digitiser behind the screen and optionally removing the keyboard - aimed at artists), and the Newton as chief inspiration for handwriting recognition - in concept if not execution. The Galaxy Note line I'm sure is good kit (I'm tapping this on a Galaxy S), but I don't see how it has that much influence on the iPad.
Remember that relatively few people with an iPad also bought the Apple Pencil - the main use case was for graphics work. The number of people who might buy the pencil for note taking was likely lower still. So, handwriting support was a low priority for Apple, and something they must do well if they are to do it at all or else risk people making jokes about the Newton. Ipad Minis are more likely note taking devices than the original iPad Pros, and the Minis received Pencil support only much later.