There are a few factors that make solenoid valves and control valves different from each other, although both valves are used to control the flow of fluids or gases. Solenoid valves are electromechanical devices that use an electric current to control the opening and closing of the valve, while control valves are typically operated by hydraulic or pneumatic pressure. Another difference is that control valves are typically more complex in design and can be used to adjust the flow rate or pressure of the fluid or gas being controlled. In contrast, solenoid valves are typically smaller in size and simpler in design, making them more suitable for use in applications where space is limited, or a smaller flow rate is required.