How to use the same mesh for different objects in space ?

[GrosSacASacs]

How can I use the same mesh for 2 different object in the 3D space ?

What I tried:

    //...
        //before the mesh is loaded we use another mesh
        hero = BABYLON.Mesh.CreateSphere("sphere1", 16, 0.1, scene);
        enemy = BABYLON.Mesh.CreateSphere("sphere2", 16, 0.1, scene);

        BABYLON.SceneLoader.ImportMesh("fr", "/", "models/5.babylon", scene,
            function (newMeshes, particleSystems) {
                camera.target = newMeshes[0];
                hero = newMeshes[0];
                enemy = newMeshes[0]
                //how can I separate hero and enemy again ?
            }
        );
   //...

If there are different ways to do , give me the one that uses the least resources.

[adam]

You can use instances:

http://doc.babylonjs.com/tutorials/How_to_use_Instances

http://doc.babylonjs.com/classes/2.3/Mesh#createinstance-name-rarr-instancedmesh-classes-2-3-instancedmesh-

or clones:

http://doc.babylonjs.com/classes/2.3/Mesh#clone-name-newparent-donotclonechildren-rarr-mesh-classes-2-3-mesh-