Have read Rod a few times too
! And good info in the link, that I've read before. I agree how interesting it was that it was not that much of a time difference in overall charging. And yes, Smart Charger's many times 'out smart' (Or, IMO, do not have the flexibility to allow the person behind the curtain, to override their programming
!), by stepping back the Bulk/Absorb charge levels.
Lifeline's do allow a rather substantial amount of AH's while charging... And having multiple charging sources (Including Non Smart - User Controlled values) can allow the person behind the curtain, to pump in some AH's over limited time periods
! (And, very possible other AGM's do too... And, know question, not the same as Lithium on the recharging front
As with many things in life. Price points, vs ease of usability, vs actual needs - do become part of the decision process.
Best to all,