Beechcraft King Air 360 Er vs Bell 525 Relentless vs Boeing Bbj Max 9 vs Piper M600 Sls

The Beechcraft King Air 360ER is a twin‑turboprop business/utility aircraft suited to short and medium missions, offering roughly 1,800–2,000 nm range and typically carrying about 6–9 passengers in an executive layout (more in commuter configurations). The Bell 525 Relentless is a long‑range, fly‑by‑wire super‑medium helicopter aimed at offshore and corporate transport, with about 500–600 nm range and commonly seating around 10–16 passengers depending on interior and mission equipment. The Boeing BBJ MAX 9 is a VIP airliner in an entirely different category: a large‑cabin, ultra‑long‑range jet designed for intercontinental travel, with approximately 6,000+ nm range and VIP capacities often around 25–50 passengers (while capable of far more in airline seating). The Piper M600 SLS is a single‑engine turboprop personal/business aircraft optimized for owner‑pilots, with about 1,500–1,700 nm range and seating typically 4–6 passengers. Overall, the BBJ MAX 9 dominates range and cabin scale, the King Air and M600 prioritize efficient point‑to‑point access, and the Bell 525 trades runway independence for shorter range.