Difference Between Cloning or Healing via GIMP?
The clone stamp paints a complete copy of whatever you select. The healing brush tool keeps the highlights and shadows of wherever you’re painting and only paints the color of your sampling area. This makes the clone stamp much more suitable for areas with defined edges, since the healing brush will only blur the color and you’ll end up with messy, smudged edges.
Think of the clone tool as brutal Copy-Paste! The healing tool softly feathers the outside; offering faded edges while ghostly blending the pixels & repairing irregularities. So ideally you can use cloning tool first, then the healing tool later! Control-click repeatedly to choose the sampling {source} area used to repair the {destination} section.
Source: video
