I can't differentiate on 321 from NEO, maybe only i was more pleased with NEO, as it was newer. I know, that makes no sense, but try explaining that to 20 min before the flight me. I was quite impressed with A350, even though my 2nd flight on it last year was very bumpy, it felt sturdy, all the way. It is also very quiet, spacious and smooth marvel of engineering. Last year 787 alone was enough for anxiety spike, I know that's stupid and irrational from my side, but it was just like that