Anyone have experiences with how well the space gray vs. silver aluminum models hold up to scratching and scuffs marks? I have an S3 Silver Aluminum and am considering switching to a Space Gray Aluminum, but I worry that Space Gray has a greater potential to show scratches and scuff marks if I end up banging it somewhere. It’s one reason I always go with silver iPhones, but wanted to see if others have experience with two types of aluminum finishes. Thanks.