Just ordered a 9th Generation iPad. The iPod has been discontinued, so I decided to take advantage of Best Buy's sale plus a store credit I already had with them.
My plan is to use the iPad at home, and continue to use my iPod when I go out.
My impression is that they are somewhat similar but that the iPad is more versatile. This particular model lacks cellular. But I don't want cellular, because I don't want a phone bill.