l have looked on all search engines, and I've come up with nothing.

Go directly to the Infiniti official web site. They should have a picture gallery , colors, options, etc. That is what we do when we are preparing to purchase a new vehicle. We just did this for our new Toyota Tundra pickup.

The dashes looks Identical with and without premium package.
The premium gives you Memory power seats, power tilt steering, sunroof and Bluetooth phone system. Even the Inteligent Key is now standard. A Nav package also looks the same with the exceptions of a few buttons.