Airbus Helicopters H175 vs Bell 525 Relentless vs Leonardo Aw139 vs Leonardo Aw169 vs Leonardo Aw189

All five are twin‑engine, IFR‑capable civil helicopters aimed at offshore, EMS, utility, and VIP missions, but they sit in different size classes. The Airbus Helicopters H175 and Leonardo AW189 are large‑cabin “super‑medium” types: they generally offer the longest practical legs for offshore work and the most space, typically seating around 16–19 passengers in high‑density configurations (with fewer in comfort/VIP layouts). The Bell 525 Relentless is also a super‑medium and is positioned similarly for long‑range offshore and high payload, with typical layouts in the mid‑teens and maximum seating around 16–20 depending on configuration. The Leonardo AW139 is a widely used medium helicopter; it usually carries roughly 12–15 passengers and offers strong all‑round range for regional offshore, EMS, and SAR, though typically less cabin volume than the super‑mediums. The Leonardo AW169 is the smaller light‑intermediate/medium‑light option; it generally carries about 8–10 passengers and has shorter range than the larger aircraft, trading cabin size for lower operating footprint and cost.