Fontinalis vs Vesicularia ??

Does anyone know if there are two forms of Vesicularia dubyana (Java
Moss) ? I seem to have either two forms or one of them is actually
Fontinalis. There is this one that is more compact and prostrate
(Vesicularia ??) and the other one that is more loose and upright, and
is also thinner than the other one (Fontinalis ??). Both of them are in
the same tank.