The Oriental Aquarium catalog lists these two plants separately. In any case, I've just e-mailed them at the contact information provided by www.orientalaquarium.com
, asking that they come to this thread for some clarification. Let's hope that I'll get a response.
Maybe someone of status such as yourself HeyPK should contact them so they'll take the inquiry with some seriousness. Or perhaps our Singaporean forumers (forumners?) can just walk up to them and demand an answer. Ha ha.