Which is Better For Your Machine Learning Task, OpenCV or TensorFlow?

I like to stay up-to-date with what's happening in the field of ML because this is a field that can surprise you almost everyday! Which is better OpenCV or Tensorflow? To some, this is not a valid question. To others, this is a question worth thinking about. The simplest answer is that Tensorflow is better than OpenCV and OpenCV is better than Tensorflow!