I’ve flown multiple 787 flights across the Pacific with Air Canada and I am always noticeably less tired and get over my jet lag quicker, when compared to flights in a 777 or A330.
I’ve discussed this with AC cabin crew a few times and they are in agreement with me, they much prefer the 787.
I’ve also had a flight on an A350 with similar experience.
The only thing I don’t like about the 787 is the crew’s ability to override my setting of the polarized window blind!