Yes, there is a difference between a tub drain and a shower drain. A tub drain is designed to handle water draining from a bathtub, which is typically deeper and holds more water than a shower. Tub drains are usually located at the bottom of the tub and are larger in diameter than shower drains to accommodate the larger volume of water. On the other hand, a shower drain is designed to handle water draining from a shower, which typically has a shallow pan and less water volume than a bathtub. Shower drains are usually located in the center of the shower pan and are smaller in diameter than tub drains. In addition to their different sizes and locations, tub and shower drains may also have different types of stoppers or strainers to prevent hair and other debris from clogging the drain.