THREE.js renderers

Can someone explain what is difference between three.js renderers? Which one is faster? Which one is more standard and cross browser? How the svg renderer and dom renderer work? I have different result when I use webGl instead of canvas renderer for below code so why it should happen?
cube = new THREE.Mesh( new THREE.CubeGeometry( 200, 200, 200, 1, 1, 1, materials ), new THREE.MeshFaceMaterial() );
Is it a big difference between canvas and webGL? which one I should use for a high viewed website?