I am trying to relate your results to what I know from doing lots of charging and noting the times, amps, voltages and AH. I usually get similar results. If I don't, then I know something has gone wrong. Eg, I have found a hot loose connection making R too high so amps taper too soon, or whatever.
I could be out to lunch trying to see your results in those terms adjusted for what appears to be normal in the Li graphs linked before from Batt-uni. I am not getting a "fit".
If we had more BB results to compare with so we know what is normal it would sure help. There is/was a lot of BS about AGMs "out there" such as that they "charge 5 times faster" or at least a lot faster, but it turned out they act about the same as Flooded batts.
I had my results that showed that, but it took a website from a boat guy with AGMs doing my kind of measuring to prove it. We need some other reporting on BBs like that boat guy did with AGMs.
I don't think much of that guru being quoted for his youtubes for some of his bloopers unless I don't understand him. So some other sets of results so we can see what is "normal".