Fuel comparison
No experience on 737, nor, sadly, on Concorde but do recall an occasion when travelling from Compass Centre on northside of LHR to T4 on the south side in the BA001 crew's van when we got to comparing fuel figures.
Turned out that they would burn slightly more fuel getting their 100 pax from T4 to 1000' agl than we would use to get our 180 pax on the 757 all the way to Amsterdam!
Typical burn on a 757 LHR - MAN was 2200 kgs or 2000 kgs on an a/c with the much more efficient E4 engines.