I've heard people say optical is better due to tracking accuracy although I use a laser mouse with no issues. I don't miss shots in fps or anything because of it, then again I'm not an e-sports champ either.
That link about grip types may help you out if you're not testing in person, otherwise it can be tricky. Part of what makes a good mouse isn't just the build or capabilities but how it fits you personally. The best mouse in the world on paper won't be worth much if you find it too large, too small or awkward.