What is the difference between settlement and permanent residence?

First of all, from the part of speech,

Settled; Settled

Permanent ['ri: t] a.

Domestication tends to migrate in China, or emigrate to a certain place to settle down, while resident is more suitable for people who are their own residents and have always lived in this country, or people who do not live in their own country but are still their own residents.

It is easier to understand from this example.

But British residents who don't settle in Britain-usually because their father is not British-need to pay taxes on their overseas income and gains only if they are brought into Britain.

But for British residents who don't settle in the UK-usually because their parents are not British-their overseas income and capital gains need to be taxed only when they are brought back to the UK.

I hope I can help you ~