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Deep cycle (yellow top) is designed to be discharged repeatedly with no damage to the battery. They will be heavier due to the increased size of the lead used in the plates.
A deep cycle battery is designed for vehicles with a lot of accessories that will cause drain such as winches, large stereos, tons of off-road lighting, etc. Deep cycle batteries the same size as a regular battery do not have as high of CCA. Therefore, it is suggested to go to a larger deep cycle battery.

The yellow top Optima D75/25 has 650 CCA, while the 75/25 red top has 720 CCA. If you are in a cold climate, the CCA can be important. In addition, cranking amps at 32 degrees F is 100 amps more for the red top versus the yellow top.