I think the point that was being made is that the resistance of a wet cell at say 13.6 is greater than the resistance of an AGM at 13.6
Given a supply capable of 14.? Voltage at 50?(but in your number) amps
The AGM will accept more amps than the wet
The tests being run with out an amp hour counter or kwhr counter and or actual SG SOC check are void, they don't prove that wet and AGM charge the same
Industry valid tests measuring all variables prove AGM accept more amps at any given voltage , can accept a higher voltage, and recover to full charge state in less time,
For an RV user this means going to 90 percent charge faster, when generator run time is important
And Do the top charge with solar or at home plugged in