What is WordPress QI?
WordPress QI is a single-file installer for WordPress. It enables you to install WordPress without needing to upload a multitude of files to your server or worry about permissions.
Is this the same WordPress?
This is exactly the same WordPress that you know and love from WordPress.org, the only difference, is its wrapped into a simple fast installer.
What are the requirements?
The base requirements for WordPress QI are mostly the same as WordPress itself, However WordPress QI also requires your server to have zlib installed, 95% of webhosts have this.