Airbus Helicopters H225 vs Bell 525 Relentless vs Piaggio Avanti Evo vs Piper M600 Sls

The Airbus H225 and Bell 525 Relentless are large, twin‑engine helicopters aimed at offshore, SAR, and utility missions. The H225 typically carries more passengers in high‑density configurations (often around 16–19) and delivers long helicopter legs on the order of roughly 450–600 nautical miles depending on payload and reserves. The Bell 525 is a newer heavy helicopter in a similar range class, generally configured for about 12–16 passengers, with comparable medium‑to‑long helicopter range (roughly 500–600 nautical miles, mission dependent). The Piaggio Avanti EVO is a twin‑turboprop, pressurized fixed‑wing aircraft positioned as a fast business aircraft; it typically seats 6–9 passengers and offers substantially longer range than the helicopters, commonly around 1,400–1,700 nautical miles. The Piper M600 SLS is a single‑engine, pressurized turboprop in the personal/business category, usually seating 4–6 passengers, with a typical range around 1,000–1,500 nautical miles. Overall, helicopters trade speed and range for vertical lift and access, while the Avanti EVO and M600 favor efficient point‑to‑point travel.