I had never heard of an Avuvi until now. He is a local dog from my village which was about 35 miles west from the Ghana Border. I would not be surprised that they are similar. I will try to post some more photos of him later.
Btw, his name is Whala. If anyone is considering an African name for a Basenji puppy, I would recommend Kikuyu (Ki Coo You). Its the Hausa word for puppy.