 If you have an idea that can have multiple looks and you consider it still to be your invention, you probably want utility protection. If you follow a design pattern on this, for example, a competitor could come up with this, something that looks like this one, and they're not going to be infringing your rights. So as an inventor, think about your idea and give a lot of thought to, does the shape that I picked, is it my personal preference, or does it have to be that way? And if it's your personal preference, and you happen to like your invention shape a certain way, but you want protection regardless of what a competitor does, then you want to start thinking about a utility pattern.