Yes definitely, as the direct competitor for the A350-1000 is the 77W. However they shouldn’t squeeze that extra seat on the Boeing 787 family, they probably will though considering their rival Qatar did as well.
Basically to make it simpler, the A350-1000 is a bigger aircraft than the B787-10. Yet they have the same seat layout. (Same reason why people like to fly the A380 with Emirates instead of their 777 family on economy.)
3-3-3 on B787-10 (2-4-2 is what Boeing recommends)
3-3-3 on A350-1000 (3-3-3 is what Airbus recommends)
IF Emirates had gotten the A350’s then they wouldn’t have squeezed a extra seat, so it’s good news for the Airlines and bad news for the people that will have to fly on economy on routes where they service it.