SFO would require an extra 1500 kg of fuel
Fed Sec, I rarely disagree with your posts but SFO is closer to SYD than LAX (by about 40NM) so the only fuel difference would be due to winds.
The loads on the SFO route would not make the A380 a suitable choice over the B744.
I know of an airport just north of there (SFO) that can handle the 380 very nicely.
The A380 causes major disruptions when it taxi's at LAX - it would be much worse at SFO (yes I know it has been approved for A380 ops but it wouldn't be a simple operation).