AIR vs SID Comparison

AAR Corp is engaged in providing products and services to aviation, government, and defense market. It operates in three segments namely Parts Supply, Repair & Engineering, and Integrated Solutions. The parts supply segment majorly consists of sales and leasing of USM and aftermarket distribution of new, OEM-supplied replacement parts. Repair & Engineering segment provides airframe maintenance, component repair, and landing gear overhaul services. Integrated Solutions segment majorly consists of its fleet management and operations of customer-owned aircraft, customized performance-based supply chain logistics programs in support of the U.S. Department of Defense and foreign governments, flight hour component inventory and repair programs for commercial airlines.

Companhia Siderurgica Nacional is an integrated steel producer. together with its subsidiaries operates in five main business segments: Steel industry: production and marketing of flat and long steels; Mining: extraction, processing and marketing of iron ore, tin, limestone and dolomite; Cement: production and commercialization of bagged and bulk cement, in addition to aggregates, concrete, and other related products; Energy: generation and sale of energy from almost all renewable sources; and Logistics: participations in railways and port terminals. The group generates the majority of its revenue from the Steel industry segment. Geographically, it derives a majority of revenue from Asia.