Porn gets me off quicker. That is it's utility. When I'm self-pleasuring for enjoyment, I don't watch it, because it's more fun to use my imagination. However, when I'm sexually frustrated and can't focus on what I want to focus on, pornography allows me to cut masturbation time down from 10-20 minutes to under 5. This is a great time saver, and allows me to spend my time more productively.

It is superstimulation, and if you come to rely on it to come or develop an addiction (arguably the same thing), then you'll have a problem. But if it isn't having any negative affect on your life, then why drop it?