latex paint and enamel paint are similar however latex paint is the less expensive and less durable form of enamel paint.
The regular enamel paint is more expensive and more durable and long lasting than latex based paint and also gives a better finish than latex paint.
Latex based paint is a pretty popular choice of paint due to it being cheaper and is most commonly used to paint walls and other interior surfaces as well as outside surfaces.
If you want a more durable paint then you would want to go with the non latex regular enamel paint.
However latex based paints do a good job at painting a surface but you may need to paint the surface more often to keep the paint looking good.