MS Power Point
The difference between Slide Design and Auto Content Wizard is

Both are same
AutoContent Wizard is just the wizard version of Slide Design
Slide Design asks your choice in steps but Auto Content Wizard does not let you make choices
Slide Design does not provide sample content but Auto Content Wizard provides sample content too!

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MS Power Point
You have customized a design template in one presentation and you want to use it in another presentation. What the best way to do this?

Use the browse feature in the slide design task pane to find the file that has your design template and apply it to the current file
All of these
Save the presentation that has the design template with a new name, and then use a new file to your presentation
Copy and paste the slide with the design template you want to include the new presentation; inserted slide will inherit the design

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