Difference between 75-degree arched door and traditional 38-degree arched door

The distance from the target is different.

The larger the arch, the smaller the distance between the upper arch eye and the target, and the smaller the arch, the greater the distance between the upper arch eye and the target.

Bow door, a noun, generally refers to the size of the openings at both ends of a bow or slingshot, which is divided into inner bow door and outer bow door.