Airbus Helicopters H155 vs Airbus Helicopters H175 vs Bell 525 Relentless vs Leonardo Aw169 vs Sikorsky S 76d

The Airbus H155 is a medium twin best suited to regional missions, typically carrying around a dozen passengers in standard offshore/utility layouts, with range in the mid-hundreds of nautical miles depending on tanks and reserves. The Airbus H175 is a larger “super-medium” category aircraft aimed at offshore transport; it generally carries more passengers (often mid-to-high teens) and offers longer legs, commonly in the upper-hundreds of nautical miles. The Bell 525 Relentless is also in the super-medium class, sized similarly to the H175, with comparable passenger counts (mid-to-high teens) and long-range capability in the same upper-hundreds of nautical miles bracket. The Leonardo AW169 is a lighter intermediate twin; it typically seats fewer passengers (roughly 8–10 in many configurations) and has shorter range than the super-mediums, usually mid-hundreds of nautical miles. The Sikorsky S‑76D is a medium twin optimized for executive and offshore roles; it commonly carries around 8–12 passengers with range generally in the mid-to-upper hundreds of nautical miles, often competitive with H155 but below the super-medium class.