The yellow top optima batteries are deep cycle batteries. A good choice if your have tons of electrical accessories, like a winch for example. The red top is a conventional car battery. In an ordinary econobox like a 07 Corrolla, you’ll never see the benefit of the optima. Where they shine is in their resistance to vibration damage and the fact they are totally sealed and can be mounted in places that a conventional battery cannot. They are quite popular among the off-roading set for those reasons. But in a normal car, you’d be better off with a regular battery for less than half the cost.