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Shader Time Variable by Delta Time or Float - better habbits?


Pryme8
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So would there be any benefits or cons to doing something like this:

var time = 0;
engine.runRenderLoop(function(){
        scene.render();     
         var d = engine._deltaTime;
         time+=d*0.0001;
          shader.setFloat('time', time);        
});

as opposed to:

var time = 0;
engine.runRenderLoop(function(){
        scene.render();     
        time+=0.01;
        shader.setFloat('time', time);        
});

Is there a way to guarantee clients will get the same time 'coordinates' on a shader even with different io speeds?

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