When evaluating garden tractors, focus on the Engine Horsepower (HP) and Displacement (cc); for heavy-duty tasks, a minimum of 20-25 HP is recommended. The Transmission Type is critical—Hydrostatic transmissions are preferred for their smooth speed control compared to manual ones. Additionally, inspect the Cutting Deck Width (typically ranging from 42 to 60 inches) and ensure it is made of reinforced or fabricated steel rather than stamped steel for better durability. For professional use, prioritize models with Cast-Iron Front Axles to handle the stress of uneven terrain.