the yellow top does transfer slower. It has thicker plates inside, so they dont get degraded easier(deep cycle and also charges slower), where as the red top use thinner plates inside for a faster transfer rate(also faster charging), but downside is battery doesnt do so good on its own with the car off. if you are constantly dipping into the battery with the car on then i say get the yellow but note you should step that alty up too if you are doing that soo much. but other than a red top will do the job