Beechcraft King Air 360 vs Bell 525 Relentless vs Leonardo Aw139 vs Piaggio Avanti Evo

The Beechcraft King Air 360 and Piaggio Avanti EVO are pressurized twin‑turboprop airplanes, while the Bell 525 Relentless and Leonardo AW139 are twin‑engine helicopters. For category and typical use, the King Air 360 is a versatile utility/business aircraft suited to short runways and regional missions; the Avanti EVO is a faster, more business‑oriented turboprop optimized for efficient point‑to‑point travel. The AW139 is a widely used intermediate helicopter for offshore, EMS, and corporate shuttle work, and the Bell 525 is a larger, fly‑by‑wire helicopter aimed at offshore and high‑end transport. On range, the airplanes generally fly farther and faster than the helicopters: King Air 360 and Avanti EVO typically offer roughly 1,000–1,800 nautical miles depending on payload and reserves, whereas AW139 and Bell 525 are commonly in the several‑hundred‑nautical‑mile class, with the 525 generally longer‑legged than the AW139. On passenger capacity, King Air 360 and Avanti EVO are commonly configured for about 6–9 passengers, while AW139 often carries around 8–12, and Bell 525 can be configured for roughly 12–16, depending on interior and mission.