Well, there are three varieties.
The OPTIMA® is like no other battery found in today's market. OPTIMA's unique Spiralcell design offers the greatest technology in providing a strong and clean power source that far surpasses any of today's filled lead/acid batteries. With OPTIMA under your hood, you can count on a longer lasting battery life under starting and deep cycle applications. Today's power demand from cars, trucks, and SUVs are greater than ever. Over the course of the century we have upgraded and customized our vehicles in such a way never imagined by early engineers. There continue to be
more lights, LCD screens, gaming systems, stereos, laptops, and cell phones going into cars, all demanding a greater power source. OPTIMA can provide all the power needed to run these power pulling vehicles. OPTIMA batteries always has safety in mind, with its spill-proof case it helps to ensure the safety of the environment, your family and you. Powerful, 2x longer-life, safety, spill-proof, vibration resistance, multi-position installation whether you're working, driving cross country or for just play, let OPTIMA help you maintain the power demands you require.
The OPTIMA RedTop
The looks alone generate plenty of buzz. But it's the patented SPIRALCELL® Technology in OPTIMA RedTop batteries that's truly worthy of praise. OPTIMA RedTop batteries are built to withstand the abuse Trucks, SUV's and 4x4's experience on and off-road. SPIRALCELL Technology immobilizes the internal components of the battery, enabling OPTIMA batteries to withstand incredible amounts of vibration.
Vehicles modified for better engine performance demand more from a battery. OPTIMA batteries withstand the high underhood temperatures associated with these Performance vehicles. The sealed cells make the battery spill-proof, even if you install it on its side! This prevents external gassing and leaking which can damage engine components and limit battery performance.
If your battery is used in vehicles that demand extra reliability and performance, or if you just take pride in getting the best performance out of your vehicle, OPTIMA RedTop batteries deliver the performance you demand.
The OPTIMA YellowTop
Demand more from your vehicle? Then get more from your battery. OPTIMA YellowTop batteries are made for the extremes. If you have an extreme vehicle, you expect high performance. Whether your vehicle is made to take the abuse of off-road driving or cranking out decibels, you need more from your battery. OPTIMA batteries with patented SPIRALCELL® Technology deliver that performance. The deep cycle characteristic of this technology coupled with its extreme resistance to vibration provides performance vehicles with the repetitive power they need in a spill-proof package.
If your vehicle has a lot of accessories like running lights, high-performance stereo/AV system, winches, or hydraulics, your vehicle demands more from its battery. OPTIMA YellowTOP batteries provide the extra performance and deep cycling capability that your vehicle demands.
The OPTTIMA BlueTop
The OPTIMA® BlueTop battery will keep you on the water longer. Its patented SPIRALCELL® Technology means more running time, faster recharge, and up to twice the life of traditional marine and RV batteries.
Vibration Resistant
The OPTIMA® is over 15 times more resistant to vibration than other batteries. The constant vibration and jarring from waves can be deadly for traditional marine batteries. The tightly wound construction in OPTIMA® batteries minimizes plate movement and subsequent damage caused by harsh conditions - extending battery life.
Nonspillable/Maintenance Free
The OPTIMA® is spill-proof and maintenance free. Because of its completely sealed case, OPTIMA® batteries are extremely safe. Acid can't leak or spill, making them clean, user-friendly and environmentally sound. In addition, the maintenance free sealed case design eliminates the need to add water or clean terminals. OPTIMA® Blue Top batteries are spill proof, so they can be mounted anyplace inside a boat or RV, in almost any position.
Hope that helps

(sorry for the longness of my post)