What is the difference between customize and override?

[coderberry]

The docs have the same description for both customize and override, and the code looks like both methods do the exact same thing. What is the difference?

[mtimofiiv]

It's a year later, so you likely figured this out by now, but:

If you wish to run a method before any customization or field pre-processing, you may use override the cousin of customize.