^^Interesting since on Optima's website they state that the yellow top is dual purpose for starting and deep cycling.
OPTIMA YellowTop Benefits
Dual Purpose starting and deep cycling.
Lasts up to 2 times longer than other batteries.
Constant performance quality keeping your battery running at the same level even as it's being discharged.
More power in the initial 1, 3, 5, and 10 seconds of the starting process than comparably rated conventional lead acid batteries.
Ideal for seasonal use, fully charged, it can sit unused for up to 12 months at room temperature (or below) and still start a car.
15 times more resistant to vibration than other batteries.
Nonspillable and can mount in almost any position.
http://www.optimabatteries.com/publish/optima/americas0/en/config/product_info/automotive/deep_cycle.html