I've also been looking at getting an optima red top here pretty soon. This may seem stupid, but whats the difference between the 34 & 34R vs. the 75/25 vs. the 34/78 & 25? They all seem to have pretty close to the same specs, and I'm having a hard time distinguishing much difference between the different models. Is there a particular one you recommend, or are they all basically the same?

94' 22re Ex Cab 4x4...pretty much stock, 2" 4 Crawler body lift and 32 x 11.50 bfg mud terrains.