As a baseline, manipulation involves much more complex modifications than photo editing. Photo editing is more of an umbrella term for enhancements you make to get the most out of your captures. This may include changing brightness, tonality, saturation, sharpness, and so on.
Photo editing may also refer to retouching photos. The retoucher may heal the model’s skin, remove blemishes and stray hairs.
At times, editing might involve light manipulation techniques as well, such as adding or removing a small object or replacing the background.
Actual photo manipulations, on the other hand, consist of multiple images put together. Digital artists may blend images together, use textures, or add elements cut out from a different photo or even 2D and 3D objects.
Photo manipulations make it possible to create totally new and fantastic artworks that wouldn’t be possible in real life.
My Surreal Manipulations, for example, are oftentimes made up of a couple of hundred layers that I use to combine different images and elements. In some cases, even my main characters are built from a number of individual pieces.