That's different from a Boeing 777-300, for which the code is 773. (BA has 77Ws but no 773s.) 777 is the generic code for all 777s. A 777-200 (or 777-200ER) has a more specific code of 772. BA has both 777-200s and 777-200ERs. (A 777-200LR has a specific code of 77L, but BA has none of these.)
McDonnell-Douglas MD-11 vs. Boeing 777-200. Values may not be 100% accurate. Engine thrust, MTOW and range (full load) based on best options available. Passanger capacity in standard 3-class layout for widebodies and 2-class for narrowbodies (including A300, A310).It is one of three options for the Boeing 777-200, -200ER, and -300 versions and the exclusive engine of the -200LR, -300ER, and 777F. The GE90 was the largest jet engine until being surpassed by its successor, the GE9X, which has a 6-inch (15 cm) larger fan diameter.
As is typical with reverse-herringbone seats, the cabin is arranged in a 1-2-1 configuration with direct aisle access for each seat. Air Canada has two versions of the 777-300ER, and mine was the premium-heavy configuration with two biz cabins. The larger seven-row cabin occupies the space between doors 1 and 2.