Height
A captain’s bed is set on a platform often making it sit higher off the ground than a regular twin bed. The height may not be a problem for older children, but you may need to consider the ease of getting into the bed if you are shopping for a toddler or smaller child.
Storage
Captain’s beds often have drawers or doors that turn the platform construction into a convenient storage space. You can place clothes, linens and toys into the bed platform. While you can also store items under a standard twin bed, you are limited to the height of the bed frame.
Mattress
While most standard twin beds require a mattress and a box spring, a captain’s bed just needs a mattress. Instead of a box spring the mattress in a captain’s bed lays on top of the wooden platform.
Bedding
With a standard twin bed you can use a dust ruffle to hide the frame from view. A dust ruffle is not needed for a captain’s bed.