http://www.optimabatteryreview.com/
Used to use Optimas exclusively in hundreds of Audio installs, but as prices sored to over $230 for a basic redtop When cost was under a $100 and the batteries have changed in function/longevity and they fell out of mental rotation for me..
Odessey is a bit newer and I cant really debate what I dont know about them.
Ideally I prefer the AGM from Exide mostly because of the abuse it will handle but if I could give anything worthwhile. There are ONLY 3 MAIN battery manufactures, Interstate used to or maybe still does [albeit in Mexico possibly for even cheaper labor and higher profits while raising prices still tot eh end user] and Interstate is/was one of the 3 main battery manufactures out there at one time.
But I will also say that info is at least 10 yrs old...