Electric building hoists are powered directly by electricity and typically use simpler electric motors for lifting and lowering loads. They are generally easier to install and operate, with direct control over the motor speed and direction. On the other hand, electric-motor building hoists are more complex, often incorporating advanced motor technologies and control systems. These hoists may offer features like variable speed control, energy efficiency, and smoother operation. The main differences lie in the sophistication of the motor and control systems, with electric-motor hoists often providing more precise control and better performance for heavy-duty applications.