How to change home page?

I am using the Purity theme with T3.

My current home page shows several articles with read more buttons (see attached image).

I want my home page to show the 'Corporate' style of page with the banner.

How do I change the style of the Home page to be the corporate style, and all other pages remain the style they are currently?

Please give as much detail as possible. Especially where I 'Assign' pages if that is part of the fix. Thank you.