64-bit architecture. Four-core design. Over 3.3 billion transistors. Translation: iPad is incredibly fast. Which comes in handy when you want to edit a 4K video, play graphics-intensive games, or experience the latest augmented reality apps.
The 2018 iPad has an 8MP f/2.4 system, in contrast, with a five-element lens and none of the features highlighted above. It does have slightly better low-light handling than its 2017 predecessor thanks to a new ISP in the A10 Fusion chip
Apple Pencil Support
The 2018 iPad works with the original Apple Pencil: When you draw, the Pencil sends 240Hz to the screen, which renders those line drawings at 60Hz with Apple's line prediction technology "previewing" where you're drawing to reduce the impression of lag.