I was kind of looking at these two and wondering what the major diff is since you can get the odyssey in comparable amps to that of the optima. The only thing I see is that the optima is about twice as heavy. Which may work for me, as I am wanting to mount my battery up front under the hood. I could use a little weight up there to help the four seater turn maybe a bit better. The optima I can pick up at the parts store and save on shipping. Just wondered which is better.