I think we have had this discussion previously - a gel battery is a lead acid battery where the sulfuric acid electrolyte is absorbed into SiO2 powder. I am not sure how an 'SiO2' battery differs from this, besides marketing?
Gel/AGM/SiO2 are all valve regulated lead acid batteries (VRLA, ie sealed) so I guess you could claim they are all modified versions of each other.
A higher quality AGM like Odyssey/Northstar have internal resistance around 2-3 mOhms, cheaper ones like Renogy are around 4-5 mOhms. LiFePO4 (eg Lithionics) are at about 3 mOhms. In these cases you will have 30 - 60% lower voltage drop under load.