Compare one part at a time. Start at the top, then look at the rocket and ground. Name the object and its change. A moved object is still the same count of objects. You can use the written scene descriptions as well as the pictures.
Worked example
If a star moves from the left of a rocket to its right, its position changes. There is still one star. Saying where it moved is more useful than saying that the picture feels different.
Two Rocket-Pad Scenes
Scene A: one star at the upper left, a rocket with one round window, and two ground blocks. Scene B: one star at the upper right, a rocket with two round windows, and two ground blocks. Both pictures remain visible. On paper, mark the two changes and say one thing that stayed the same.