Thee are absolutely not the same Ficus species.
Ficus sagittata is a trailing, creeping type of Ficus.
Ficus elastica is a very large tree with large (more than hand-size) leaves.
Ficus benjamina has similar leaves as the F. elastica but they are much smaller, about 2-3 inches. This also has the potential to become a very large tree.
These all come in green and variegated versions.
