Measuring over 10 meters longer than the A330-300 and the 777-200, the 777-300 seats a significantly higher number of passengers. Meanwhile, the smaller A330-200 is more comparable in passenger capacity with the Boeing 767-400.

No, the Boeing 777 is significantly larger than the Airbus A330 in terms of capacity, weight, and physical dimensions. For example, a standard Boeing 777-300ER has a length of about 74 meters and a wingspan of 64.8 meters, whereas an Airbus A330-300 is approximately 63.7 meters long with a 60.3-meter wingspan. In terms of passenger capacity, a 777 typically carries between 300 and 450 passengers depending on the configuration, while the A330 is designed for 250 to 300. The 777 is also a much heavier "wide-body" aircraft, designed for ultra-long-haul missions (like Dubai to Los Angeles), while the A330 is often utilized for medium-to-long-haul "regional" or trans-Atlantic routes. While Airbus has the newer A330neo, it still occupies a market segment slightly below the "Big Twin" status of the 777. The Boeing 777's massive GE90 engines are so large that the fuselage of an Airbus A320 could almost fit inside the engine cowling, further illustrating the difference in scale between these two wide-body workhorses.