Airbus Helicopters H175 vs Airbus Helicopters H225 vs Bell 525 Relentless vs Leonardo Aw139 vs Leonardo Aw189 vs Sikorsky S 92

All six are twin‑engine, medium-to-super‑medium helicopters used for offshore transport, SAR, and utility roles, but they split into two rough size classes. The Airbus H175, Leonardo AW189, and Bell 525 sit in the modern “super‑medium” category, typically offering long offshore legs and cabin layouts that commonly seat about 16 passengers (with higher maximums depending on configuration). The AW189 and H175 are broadly comparable on range and cabin volume, while the Bell 525 is aimed at similar missions with competitive range and speed in the same passenger bracket. The Airbus H225 and Sikorsky S‑92 are heavier “heavy” offshore workhorses, generally carrying around 19 passengers in typical offshore seating and delivering strong range and payload for longer sectors, with the S‑92 and H225 often chosen where higher lift and mature offshore support ecosystems matter most. The Leonardo AW139 is a smaller “medium” class aircraft, usually configured for roughly 12–15 passengers and shorter offshore range than the super‑medium and heavy types, trading ultimate cabin and range for lower operating footprint and broad multi‑role flexibility.