AGM vs Flooded Batteries - What You Need to Know
Another consideration is where you spend most of your time. AGM's do not tolerate high temperatures as well as flooded. Yes, flooded may require frequent watering in high heat but forced charging AGM's will drastically reduce their service lifespan. Insure your charging option(s) have AGM programing profile(s) and temperature sensing compensation.
"Robust" is a relative term. Difficulty of maintenance, off gassing, and spill avoidance (rollovers) are the primary attributes of AGM.