You can use the button on the S Pen to interact with your tablet in different ways, depending on what you are doing. Some uses include activating the screen, creating notes, and designing live messages. You can use S Pens made for Samsung phones on Samsung tablets that support the S Pen, and vice versa. The new pen nib has 4,096 levels of pressure sensitivity, giving you greater control than ever before. The S Pen has been redesigned, both on the inside and out, to provide a realistic pen-on paper experience. The S Pen nibs are too long for the Staedtler Noris Digital in case you're wondering. You can still write but you won't want the nib to break because it's difficult to get a broken nib out from the holder. Availability of pen nibs

How to replace the S Pen nib | Samsung Philippines

In terms of writing and drawing performance, there's not much difference between the non-original vs original nibs. The hard plastic tips are slightly smoother, which is better for writing. There are different types of S Pen nibs though. The original nibs from Samsung S Pen actually comes with a rubber/matte texture tip on the nib. It's difficult to see but it's there to provide the extra friction, or maybe it's there to dampen the tapping sound while writing.

What is the Samsung S Pen?