Personally I think its more of an application thing.
Thinner plates doesn't mean that its not less durable, you can still build them robust, it just means its cable of more discharge current.
Thicker the plates, the better they resist sulfation when you cycle deep, and because of that it will have less CCA.
Both types of batteries can be build well for their respected applications... if this is going to be a starter battery, you could lean towards more CCA.
I still look at the pro-rate warranty because I have actually got back $30 ish before in addition to the core charge after 3 years... Not bad if you decide to change a little early.
They are both sold as starter batteries, so I don't think it matters too much. 710 CCA should be more than enough. I can't think of a good reason why one or the other would last longer, but the higher reserve capacity sounds better to me, so that's likely what I'll go with. The Toyota Truestart 24F could also work for our application, and that has only 575 CCA. Of course we might as well go with the biggest battery that will fit.