Buy for Touch ID & FaceTime HD
The 2019 MacBook Air offers the best of both worlds, and something you won't find on the MacBook Pro. You get Touch ID without a Touch Bar. This means you can login with your fingerprint and you can still use the normal keys on your top row.
Touch ID is a great way to login, and you can also use it to buy stuff with Apple Pay on your Mac or to approve app installs and other items without entering your password.
Apple also includes a FaceTime HD webcam on the 2019 MacBook Air, and it is still at the top of the screen, even with a super-small bezel. This keeps the viewing angle head-on instead of looking up at you like on some Windows notebooks use with their cameras.