I have a layer group which appears in 15 layer comps in the same position, and I need to move it to a new position in all layer comps. (1) Move the layer group to the new position in one of the layer comps. (2) Make sure the layer group is selected. Make sure the updated layer comp is selected. (3) Now select all of the layer comps too. (4) Use the „Update Position“ button in the Layer Comps panel (not the Refresh symbol button). Now the layer group should be repositioned in all layer comps.

Quelle: Copying layer comp positioning in Photoshop CS – Graphic Design Stack Exchange