Right. I don't remember the exact numbers but the difference might have been even more than a few hundred dollars.

I have a related question about how to estimate the taxes and surcharges. Can one go on a site such as ITA and pull out the figures for a separate trip, then look at the pricing details to get information about surcharges, etc. For example, taking LHR-LAX in business class for Sep. 1, both AA and BA have the same overall fare of US$7234. However, the base fare is slightly different and BA shows a YQ surcharge of US$65 while AA shows no such surcharge (so it looks like AA builds it into the base fare). If such surcharges applied to RTW tickets, one could get an estimate of the total by checking out each individual segment in one's itinerary-- tedious but if it were applicable, at least one has an estimate. For those in the know, do these individual surcharges apply to the segments and if so is there an easier way to get them? And what can one conclude about AA building the surcharge into the base fare of individual tickets while BA breaks it out separately?