Migrating data from old MacBook Air to New One

I will be getting a new MacBook Air in a few days and want to set it up from either the old MacBook Air or my external back-up drive. In the past, with previous Macs, I did this from old to new Mac. However, this time I might not be able to do it that way because my old MacBook Air has a charging issue.

I have researched setting up the new MacBook using my back-up drive, but still have some questions. Will migrating data from my back-up drive be as complete as it would be from my old Mac. For example, will it bring in settings like the old MacBook would? I would be using a USB-C to USB adapter; would it be a lot slower than from Mac-to-Mac?