hi, heres a copy of a "trip-report" I posted some time ago:
I recently (september 2000) had the opportunity to compare BA and SN directly. Due to strike in brussels, my SN flight BRU-BOS was changed into LHR-BOS on a BA 777. my trip back was SN on an A330.
BA seats had more legroom and were wider than the SN seats.
No PTV in the SN-Airbus. PTV in BA-Boeing.
Eyepads, toothpaste and brush, slippers and real blanket in BA. Very thin, non-warming blanket with SN. Nothing else.
Food is about taste and therefore partially subjective. I really enjoyed the tasty spicy chicken in BA. I returned half of the pale and greasy SN-veal to the FA.
More objective differences: BA: printed menu SN: FA's mumbling menu immediately before serving. SN: everything except the veal was icy cold (bread, butter, fruit and salad). BA: everything had the right temperature. SN-Breakfast consisted of a gum-like, cold croissant.
FA's were more friendly at BA. This, of course, is a very subjective impression too.
No other differences.
Bottom line: In future, I'd prefer BA over SN. I think the better service is at least woth $100 for a transatlantic trip.