What are the key differences between a bike trainer and a spin bike, and which one would be more suitable for my indoor cycling workouts?

A bike trainer is a device that allows you to attach your own bike for indoor cycling workouts, while a spin bike is a stationary bike designed specifically for indoor cycling. A bike trainer offers the advantage of using your own bike, while a spin bike is a standalone unit. The choice between the two depends on your preference for using your own bike or a dedicated spin bike for indoor cycling workouts.