I have the air and the pro. The air is plenty fast but can be difficult when you have large RAM consumption use cases such as doing front end workloads. It also can have some visual lag if you’re plugging into a larger monitor.

The pro, though very fast, can also hang when leaving too many apps open. But I did leave way too much running. It feels blazingly fast.

You should really think about that workloads you will use in the day to day. And also consider if you’re docking it. If you are, the pro is a much safer bet and the screen brightness and size is less relevant.

So the tldr is that the 64Gb of ram is the big differentiation. The other is plugging monitors into the pro.