The most critical factor is mechanical compatibility, specifically the mounting bracket design and hydraulic system integration. You must verify the lifting capacity (kg) at full height and the maximum lift height (mm) to ensure it meets your operational needs, such as loading high-sided trailers. Additionally, ensure the loader features a Quick-Attach system (like Euro-hitch or Skid Steer style) for rapid attachment switching and third-function hydraulics if you plan to use powered implements like 4-in-1 buckets or bale grabs.