There is not a wild and wide difference between golf car and regular batteries with AGM. Flooded batteries though are radically different and offer numerous differences in durability - golf car AGM batteries exist to fit where flooded GC220 batteries were before.
Using the same philosophy on 8-D AGMs, they fit perfectly where flooded 8-Ds used to be.
Are fewer terminals to deal with worth the price of 160 pounds to heft? Fewer terminals are definitely an advantage where corrosion is a threat -- but corrosion is not a threat with a sealed battery.
I seem to be fond of the extra tall Lifeline group 31 battery. Same footprint as a group 31 (13" long) but it's taller. 150 ampere hours. 96 pounds weight. It is a 1-1/2 times the size group 31 battery.
The super thick plates and extremely high charging ampere ability of the Lifeline offer durability and faster charger times. The Lifeline plates are twice as thick as many competing AGM batteries and that translates to lifespan. Indeed, I am so frugal a cheapskate I would not consider an alternative brand :)
Three of the tall GPL-30HT 31's would yield 450 amp hours or 4 of the regular XT 125 amp hour 31's would fall short of the 500 ampere hour spec. you desire by 20%.
I am not at all self conscious about depleting the Lifeline battery to 40% of it's amp hour capacity. Double the plate thickness means something here.
