Unfortunately the taller plant isn't a Kiwi plant, but something else.
That plant also exists here in my Island, but I don't know it's name, however I can tell you it grows fast, it flowers fast, and it produces a lot of seeds. it also can suck a lot of nutrients and water from plants palnted by it's side and cause a lot of shade that will kill some plants; so better get rid of it.
Good luck with the kiwis in northern Brasil.