Question Sprite vs Image vs Raw Image

As far as i know, there are three ways to use images in Unity
- Sprite (Sprite renderer)
- Image (UI Canvas)
- Raw Image (UI Canvas)

I wondered when and how to use each method.
I have looked up reference documents and forum information to resolve my question,
but I have yet to clarify my question.

Q1 ) Below is the information I understand. Is there something wrong?
Sprite : available anywhere by adding Sprite Renderer component
Image, Raw Image : available only under UI Canvas object
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Sprite, Image : only use Sprite Image == easier to work(like sliced..?) / uses a lot of memory
Raw Image : any type of Texture == just for display / make extra draw call
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Q2) So exactly when and what is appropriate to use?
I understand that a particular method is advantageous in performance under certain conditions.
I could get some piecemeal information, but frankly it is not clear what "standard" to use.



Q3) If one source is needed in two cases(Spirte / Defalut Texture Image)
Do I have to import the same source twice and change each setting?
Or is there any other way?