Difference between 'get sth done' and 'have sth done'

[Genzo]

I'm a new member in this forum. I have leant E for a short time. And I have a question in one of the thing I'm very bad.

Is there any differences between get something done and have something done?

[Haihao]

Almost the same thing but "get something done" would be a little more aggressive.

[Inga]

Compare the structures with get and have (causatives):
I'll get the waiter to bring you the menu.
I'll have the waiter bring you the menu.
- the meaning is 'cause or order someone to do something' (active pattern).
I'll have/get the menu brought to you.
She's getting/having her teeth fixed.
The meaning is 'arrange for somebody else to do something' (passive pattern).

We use have + object + past participle to describe things that happen to us, often misfortunes. The subject is the person who experiences what happened:
I've had my car stolen.
In spoken English get is sometimes used (instead of have):
She's got another letter published in The Times.
Sometimes only the context will identify precise meaning:
They had their fence pulled down. (either they employed somebody to pull it down; or it was pulled down without their planning it, e.g. by vandals.)

But these are only rules...

And my grammar book says that in American English have is much more common, get is common in spoken British English.

[Molly]

[Haihao]

I feel "getting my hair cut tommrow" would show the speaker's will a little more firmly.

[Molly]

[Haihao]

I am sorry for the wrong word, maybe. I meant to say a sense of "up-and-coming" or "get-up-and-go" or "forwardness". Can't aggressive mean that?

[Yankee]

[Haihao]

[Molly]

[Molly]

[Yankee]

[Haihao]

Hi Amy,

Thank you so much for your detailed paraphrase and pointing out what I intended to express. Actually I was puzzled with them as well enough for the lack of context. Now I understand the reason of it and you have made everything as clear as day.

Haihao