Bell 525 Relentless vs Enstrom 480b vs Piper M600 Sls vs Robinson R66

The Bell 525 Relentless and Enstrom 480B are helicopters, while the Piper M600/SLS is a single‑engine turboprop airplane, and the Robinson R66 is a light turbine helicopter. In category and mission, the Bell 525 sits in the “super‑medium” class aimed at offshore, corporate, and utility work, whereas the Enstrom 480B and Robinson R66 are lighter, general‑purpose helicopters suited to training, personal, and light commercial roles. The Piper M600/SLS is oriented toward owner‑pilot travel and business transport, trading vertical access for higher cruise efficiency. On range, the Piper M600/SLS typically offers the longest cross‑country capability, commonly around 1,000+ nautical miles depending on reserves and payload. The Bell 525 is next, generally in the several‑hundred‑nautical‑mile class for helicopter missions (often around 500+ nm). The Robinson R66 and Enstrom 480B usually have shorter legs, commonly a few hundred nautical miles. For passenger capacity, the Bell 525 carries the most (typically up to about 16 including crew in high‑density layouts), the Piper M600/SLS seats up to 6, and both the Enstrom 480B and Robinson R66 are typically 5‑seat helicopters.