There is not a difference. If there is something you hate about a light, whether it's a feature like SOS, or something about the light's styling, or maybe that the manufacturer or vendor did something you don't like (like M*g and its lawsuits), then that hate (or even mere distaste) consumes some of your mental energy and therefore gets in your way. Sure, an unwanted feature's presence may not impair the light's functionality that much, but as flashaholics and connoisseurs, we CPF'ers are usually looking for more than mere functionality. We are looking for lights that bring us a sense of satisfaction and harmony when we use them. And yes, for some of us at least, the SOS feature gets in the way of that.