Choosing between the Boeing 777 and 787 Dreamliner in 2026 depends on whether you value space or comfort. The Boeing 777 is the "King of Capacity"; its cabin is wider, which often allows for slightly wider seats in Economy (depending on the airline's configuration) and a more "grand" feeling in Business Class. However, the Boeing 787 Dreamliner is technically superior for passenger wellness. Because it is made of composite materials, it can be pressurized to a lower altitude and maintain higher humidity, which significantly reduces jet lag and dry skin. The 787 also features massive, electronically dimming windows and a much quieter engine roar. If you are a frequent traveler prone to fatigue, the 787 is the better choice; if you are a "tall" traveler who wants the most physical shoulder room, the 777 (especially the new 777X) remains the industry heavyweight.