I really have no idea whether these following plants are all closely related, but they look like it, so I'll put them all here in one post. Also, I pretty much grow all these under the same conditions, except for one - fungii. Most of them get very bright light, allowed to dry completely between waterings, and left outside in the winter down to freezing temperatures. Fungii though is kept shaded, and more even waterings, although I do let it stay outside with the rest in winter.
Since fungii requires different culture, I'll start with it.
Hoya carnosa - regular
Hoya Ban Nong Noy
And Hoya rubra