Airbus Helicopters H225 vs Bell 525 Relentless vs Enstrom 480b vs Piper M600 Sls

The Airbus H225 and Bell 525 Relentless are large, twin‑engine helicopters aimed at offshore, SAR, and utility missions. Both typically carry around 16–19 passengers, but the H225 is generally optimized for heavier lift and established offshore operations, while the 525 targets similar roles with modern systems and a slightly smaller cabin footprint in many configurations. In range, both can reach roughly the 500–600 nautical mile class depending on payload and reserves, with mission equipment and seating choices strongly affecting real‑world legs. The Enstrom 480B sits in a much lighter helicopter category, usually configured for about 4–5 occupants. Its range is markedly shorter, commonly in the low‑ to mid‑300 nautical mile class, making it better suited to training, patrol, and short‑haul utility rather than offshore transport. The Piper M600 SLS is not a helicopter but a single‑engine turboprop airplane. It trades vertical capability for speed and efficiency, typically seating 1 pilot plus about 5 passengers, and offering a longer cross‑country range often around 1,000+ nautical miles, depending on payload and conditions.