Airbus Helicopters H155 vs Airbus Helicopters H160 vs Airbus Helicopters H175 vs Bell 525 Relentless vs Leonardo Aw139

All five are twin‑engine, IFR-capable medium helicopters, but they span the light‑medium to super‑medium class. The Airbus H155 is the lightest option here, typically configured for about 12 passengers, with generally the shortest range of the group; it’s often chosen for corporate, EMS, and short‑to‑mid offshore sectors. The Airbus H160 is a newer-generation medium helicopter, usually seating around 12, offering a step up in range and efficiency versus older light‑medium types, aiming at longer legs with lower noise and fuel burn. The Leonardo AW139 sits in the core medium category, commonly arranged for 12–15 passengers, with solid mid-to-long range that has made it a workhorse for EMS, SAR, and offshore transport. The Airbus H175 moves into the super‑medium class, typically carrying about 16–18 passengers and offering longer offshore-oriented range than the H155/H160/AW139. Bell’s 525 Relentless also targets the super‑medium segment, generally accommodating roughly 16–20 passengers and designed for longer-range, higher-payload missions comparable to the H175, often emphasizing modern avionics and offshore capability.