What are the pros and cons of making enumerate a sequence if its argument is a sequence?

I found myself writing:

                for vertex, height in zip(
                        self.cache.height_to_vertex[height_slice],
                        range(height_slice.start, height_slice.stop)):

I would have preferred:

                for height, vertex in enumerate(
                        self.cache.height_to_vertex)[height_slice]: