Indeed there are. Pencil makers manufacture Nos. 1, 2, 2.5, 3, and 4 pencils—and sometimes other intermediate numbers. The higher the number, the harder the core and lighter the markings.

Once paired, go into Settings > General > About > Apple Pencil. You’ll now see the model number of your Apple Pencil. If you have the second generation Apple Pencil, you’ll see model number ...

Well, the number 2 pencil is perfect for that.” Here’s the deal with the number: it actually tells us how dense the lead in the pencil is. The higher the number, the more dense the lead.