Paint Mesh -> to Sculpt Mesh (No color and subdivision): Bring a copy of mesh or meshes from the Paint Workspace into the Sculpt Workspace as new Sculpt Objects. The mesh will be brought without textures or subdivisions.
Paint Mesh -> Sculpt (With PBR and subdivision): Bring a copy of mesh or meshes from the Paint Workspace into the Sculpt Workspace as new Sculpt Objects. The mesh will be brought with textures or subdivisions.
Paint Mesh -> Sculpt Import tool: This option creates a copy of visible Paint Meshes from the Paint Workspace and brings them into the Sculpt Workspace into the Import tool.
Name Correspondence for Baking: You may use this option to simplify Sculpt Object Baking if names of Retopo Objects correspond to Sculpt Object names.
If you check the option each Retopo Object will be baked using only the Sculpt Object of same name and its children.
Re-Bake Sculpt Mesh changes onto Paint Mesh: This command will bake changes in the Sculpt room object to the Painting Room object and update the painting layers in the process.
Previous painting layers will be preserved (whenever possible) while newly baked maps will be assigned new layers.
This command takes painting scene object as retopo mesh and bakes details and color form Sculpt scene to painting object. It allows to update normal map and color layers related to volumes.
Pay attention that painted areas on sculpt mesh will overwrite painted areas on the painting room object. So be careful to avoid losing data.