I have had both kinds and killed both kinds. I now actually have one of each as they were replaced under warranty. For long term storage you have to disconnect them or hook them up to a trickle charger if you want max life. I believe that they are rated the same, I just went with what was cheeper. Got the orbital at NAPA on sale for 99.99, and the optima at costco for 99.99, I have seen both retail for 129.99 not on sale.