The Antonov An-124 and the Lockheed C-5 Galaxy are the world's premier heavy strategic airlifters, with the An-124 offering greater payload capacity and a wider cargo hold, while the C-5 provides a longer fuselage, drive-through loading capabilities, and deep integration into U.S. military logistics.Most users on Quora agree that design intent differed: the C-5 prioritizes long-range strategic military utility, operational flexibility, and system reliability, whereas the An-124 was built to haul massive single-item industrial or military payloads.Size and SpecificationsPayload Capacity: An-124 lifts up to 150 tonnes (331,000 lbs); C-5M lifts roughly 127 tonnes (281,000 lbs) to 130 tonnes.Dimensions: An-124 has a wingspan of 73.3 m (240 ft 6 in) and height of 20.78 m (68 ft 3 in); C-5 has a wingspan of 67.97 m (223 ft) and height of 19.80 m (64 ft).Cargo Hold Volume: An-124 offers ~35,800 cubic ft (1,040 cubic meters); C-5 offers ~31,000 cubic ft (880 cubic meters).Max Takeoff Weight: An-124 reaches 402,000 kg to 405,000 kg; C-5 reaches around 381,000 kg to 840,000 lbs.Operational StrengthsAntonov An-124:Features a wider and taller cross-section in its cargo bay, ideal for outsized industrial cargo.Equipped with an internal overhead crane system, reducing reliance on specialized ground loading equipment.Operates extensively in commercial outsized charter markets worldwide.Lockheed C-5 Galaxy (C-5M Super Galaxy):Features signature nose-and-tail opening doors allowing roll-through loading and unloading of military vehicles.Features a kneeling landing gear system that drops the nose to ease vehicle access.Retains aerial refueling capability and global deployment flexibility tailored to U.S. defense infrastructure. - @legendary.sukhoi