smart chargers and Accumates

[JonE]

I noted my newish Exide 80aH is at about 6.15V after charging and was a bit sluggish on the starter motor. I use this smart charger on 'low' mostly, and it goes to green light after an hour or so and then cycles if you leave it on (which I largely don't), I imagine staying on the green. I suppose I'm not benefiting from that continual charge, but not sure whether there is a benefit after the green light comes on.

Does anyone know if the accumate will be substantially different from this smart charger? I know they are well respected and I will buy one if I need to, but don't want to if this is substantially the same...