note these numbers refer to "Volt-Amps". I have no idea why they chose these instead of wattage. I think it makes it look bigger.
I think a computer's power use in volt-amps use will be greater than or equal to its power use in watts. The ratio of watts to volt-amps is equal to the power supply's power factor (PF). If the PSU has a PF of 1, the watts and volt-amps will be the same. As the PF decreases, the power demand in watts stays the same, but the volt-amps demand increases. Active power factor correction (Active PFC) PSU's can have a PF of up to 0.99 or so, while Passive PFC power supplies might have a PF of 0.65 or thereabouts. I guess this means that using an Active PFC power supply will improve the power-on time for a system running on batteries!
Okay, you may continue to talk about UPS's now.