In theory a static entity which is the equal in file size to a dynamic entity should load faster as it at least need not have so much additional media requireing loading in support of the object in the the form of complicated scripts and so forth.
e.g.
A Static entity such as a room pillar may be of small file size, have a smaller texture file size than some types of dynamic entities, and have no animation frames and require few scripts.
A Dynamic entity such as an Enemy will have a large file size, may require a large texture file size, will most likely have many animations and require numerous support scripts some of which could be quite large.