Thers some things to remember about the physics/chemistry of these flooded
cell batteries and their design.

The battery energy delivery rate, cranky amps, is governed by the amount of
plate surface in contact with the electrolyte (acid).  The more surface the
higher the cranky amps.  The less surface the better the deep discharge
rating.

If you look around you can find lots of flooded cell physics articles.

The Gel Mat batteries have their own problems, namely they don't
particularly like to be charged from your alternator.

Pensionerd.