I've not used the N10's launcher, but in general "much more customisation" is the answer. "Smoother/more responsive" is sometimes cited, but I don't know whether that's relevant for this phone.
The last Samsung launcher I used was on my Note 10.1 tablet, and that thing even thought it knew better than me to the extent of deciding that some parts of my screen were for apps and some for widgets - no, I decide my layout, so that was gone within a minute. I like being able to decide the grid size (independently for screen and dock), remove widget padding, place small widgets in the dock if I wish, have multiple dock pages (scrolling separately from the homepage), folders in the dock, folders within folders (possible in Nova by using the Nova settings), choice of app drawer style, that sort of thing. Different launchers offer different things, some do one thing well and others less so, not all do all of the things I mention and some do others I've not mentioned, and so different people have different preferences.
(I'm using a Pixel 2, where Google think that their clock/info widget and search widget are so good that they get to decide that everyone will use them and where they will be placed on the desktop, which in my opinion is worse than an iPhone for corporate control over your UI. So I really have no choice but to use a third party launcher).
