Standard aquariums are the do-it-yourself option. They come empty and include a polycarbonate light plate(s) that cover the access openings and are compatible with modern LED light strips. There is no filtration or additional hardware included.
Uniquariums come with a 3-in-1 filtration system built into the back 4" of the tank and include everything you need to be up and running. They do not come with a light or optional items such as a heater and protein skimmer.
The Deluxe package comes with everything you need for an external filtration setup (outside the tank) and include a corner overflow installed in the back corner of your choice.