Beechcraft King Air 360 Er vs Bell 525 Relentless vs Leonardo Aw189 vs Piper M600 Sls

The Beechcraft King Air 360ER is a twin‑turboprop fixed‑wing aircraft in the utility/business category, optimized for longer point‑to‑point missions; it typically carries about 6–9 passengers and offers roughly 1,500–1,800 nm of range depending on configuration and reserves. The Piper M600 SLS is a single‑engine turboprop personal/business aircraft, generally seating 4–6 passengers with an approximate 1,000–1,400 nm range, prioritizing lower operating complexity over payload. The Bell 525 Relentless is a super‑medium helicopter aimed at offshore, corporate, and SAR roles; it commonly carries about 12–16 passengers and has a range on the order of 500–700 nm, trading speed and efficiency for vertical‑lift flexibility. The Leonardo AW189 is also a super‑medium helicopter, often configured for around 12–16 passengers with a broadly similar 450–700 nm range class depending on mission equipment and fuel. Overall, the fixed‑wing turboprops lead on range and cruise efficiency, while the helicopters lead on access to remote or confined landing sites with comparable passenger counts but shorter legs.