Bell 525 Relentless vs Leonardo Aw189 vs Piper M600 Sls vs Robinson R66

The Bell 525 Relentless and Leonardo AW189 are large, twin‑engine helicopters aimed at offshore, corporate, and utility missions; both typically carry around 16–19 passengers in high‑density layouts and offer long helicopter ranges roughly in the 450–550 nautical mile class depending on configuration and reserves. The 525 is positioned as a higher‑speed, fly‑by‑wire “super‑medium” with strong hot‑and‑high performance, while the AW189 is a well‑established super‑medium with broad mission equipment options and a large cabin. The Robinson R66 is a much smaller single‑engine turbine helicopter intended for cost‑efficient personal, training, and light utility flying; it generally seats 4–5 people and has a shorter practical range, commonly around 300 nautical miles. The Piper M600 SLS is not a helicopter but a single‑engine turboprop airplane; it typically seats up to 6 and trades vertical‑lift capability for higher cruise efficiency and longer range, commonly around 1,000+ nautical miles, making it best for fast point‑to‑point travel between runways rather than landing at unimproved sites.