Hello,
Thank you very much for choosing our theme and for contacting us.
Installing demo content doesn’t create a site that is an identical copy of our demo site because it has a big number of images that take too much time to complete.
Most images you see on our site are not included in our theme package and will not be imported.
As for the slider, it has two different templates and the other two slides are clones of these two templates with different images and text.
The Revolution Slider has the option to copy the slide, just copy, change the test and image.
Best Regards