Bell 525 Relentless vs Piaggio Avanti Evo vs Piper M600 Sls vs Robinson R66

The Bell 525 Relentless and Robinson R66 are helicopters, while the Piaggio Avanti EVO and Piper M600 SLS are fixed‑wing turboprops. In category and mission, the Bell 525 is a large, twin‑engine transport helicopter aimed at offshore and corporate operations, offering roughly a 500–600 nautical mile class range and typically seating around 12–16 passengers depending on layout. The Robinson R66 is a light, single‑engine turbine helicopter suited to short‑range utility and executive flying, with about a 300–350 nautical mile class range and usually 4–5 seats. Among the airplanes, the Piaggio Avanti EVO is a high‑speed twin‑engine turboprop optimized for efficient business travel, with roughly a 1,500 nautical mile class range and commonly 6–9 passengers. The Piper M600 SLS is a single‑engine turboprop positioned for owner‑pilots and personal/business trips, with roughly a 1,000–1,400 nautical mile class range and typically 5–6 seats. Overall, Avanti EVO leads fixed‑wing range and speed, Bell 525 leads rotary‑wing capacity, and the R66 is the smallest and shortest‑range option.