|KLM B787 Business CLass|
1: Wider in Seats
B787 was first meant to have only 8 across in Economy, however, Most Airlines now have 9 across in Economy Class. While A350 is designed for 9 and only have 9 seats per row on all airlines in Economy Class.
2: Better Window Designs
B787 have very high - tech windows shades which I have found it is poorly designed. While A350, on the other hand, has traditional window shades which I prefer more.
A350 is wider than B787, airlines can put better products onboard that B787 can not.