if you check AT THE TOP's ( https://tickets.atthetop.ae/atthetop/Step0_BookingInfo.aspx ) pricing, you can see the price difference. not to mention the huge queue.
just pm me on Skype with the username: lawabiding_citizen1 and we will talk further in details. i also can include a Jacuzzi and Swimming pool at floor 76 for an additional 100 DHS per person.
Also i should say there is free beverages on the house
I have to mention that i have a Burj Khalifa Entrance key under my own name and it is LEGAL to have 4 guests at a time in Burj Khalifa with a single entrance card.