OK, let's have a sensible grown-up discussion! A is great, B sucks, or was it A makes flying coffins out of plastic and B's planes are all 40-year old designs.(No, not really that's just a wind-up!)
Earlier this year, both B and A said that A would deliver more aircraft. Not a lot more, but a few more (something like 280 vs 300). However, the year to date deliveries up to end August, still show B ahead, so unless A has a delivery surge in Q4
Over the last few years sales have been split just about 50-50 (some years A sells more, some B), I suspect B has been ahead on deliveries, but A has a bigger backlog. This year on sales, A is well ahead at the moment (just about level on single-aisle, but A way ahead on big stuff), so unless B has a big 4Q
order up its sleeve....
Personally, I think the world needs two strong manufacturers to keep innovation and new planes being produced. It would be a bad thing for the airlines, and especially their pax, if either A or B dropped out. Over the next few years, assuming B stays in the game (and I can see circumstances where they don't go ahead with 7E7, 757 & 767 civil sales end, 747 is slowly dropping off, leaving only 737 & 777 competing with A), I would expect to see periods where one does better than the other, as new models come on attacking a gap in the other's range. In the long run though, it is probably best for everyone if they maintain roughly 50-50 split of sales and deliveries.
Time flies like an arrow. Fruit flies like a banana!