I'm trying to choose whether to go with the Odyssey battery or go with the Concord battery. I have the parts to do both and each looks to be about the same amount of hassle factor to install. Weight is an issue as it should be. On the other hand capacity has it's benefits. One of the questions is, is there a large difference in capacity? I'm wanting to get opinions from both sides of this fence so please step up and have your say.