They are essentially equivelent in common usage, but technically, a pre-fab home has its components all built offsite and assembled at the building site while modular shipping container homes interior generally don’t.
Anywhere from $19k to $125k
Utensils were not made from wood
Modular house cost is $75/sq.ft up to $115/sq.ft. It is vary from size of the houses and predictable costs for retrofitting and remodeling work.