The first thing that’s obvious when comparing the 3 Meter USB to Dock Cable against one of the ones Apple gives away with every iPod, iPhone, and iPad is the extraordinary thickness of Griffin’s version. Apple’s 3.3-foot-long cables are slender and in a light shade of gray that’s often mistaken for white. Griffin’s cable is 9.8 feet long, darker gray, and uses what the company has alternatingly described as 16-gauge or…