Your vanilla imperialis looks a lot like my polylepis.
I'm slightly puzzled as to how I'm going to force this thing up and down a mount or wooden branch. It's not exactly a soft stemmed, flexible thing. At least my polylepis certainly show a bit of resistance whenever I try to coax it. Mine is also a young plant and perhaps it will become easier to work with when it grows some more 'joints'.
I like the flowers of these types of vanillas. Love the purple lip.