For equivalent configurations, the A380 carries almost 50% more passengers.
A380 - 450
B747 - 310
Yes, we can work the numbers to get much more than that on a 747, but then we can do the same for an A380. For the premium market, those are the numbers.
The A380 has about the same range as a B747-400ER, cruise speed about 0.84 - 0.85
Each of the types has their advantages and disadvantages - depends what you want to use them for.
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