As I said some get better components that is evident in every industry. As someone who worked at multiple dealerships including Polaris, 2 semi-truck places and probably 4 or 5 different auto parts stores all as a Manager or Asst. Manager...I went whoever offered the most. I got to see the lists from all 4 companies multiple times.
And of course AGM is better if you can afford, but once again some as we all know..Some AGM batteries are better then others. Odyssey is a great AGM but isn't known that much in the car audio world.
Optimas however are not, people flock to them because of the name. I've seen them cut in half before by the battery guy's when they would come to try and offer their stuff. Everyone used to bring that kind of stuff to show "Oh look at this and how good the components are"..Optimas always looked like garbage.
FYI Duralast Batteries are made by Johnson Controls
. As is Diehard and a few others.
Northstar is made by Energizer now iirc as of 2019. I remember talking to an old friend of mine and hearing about this around April iirc. I would double check though. Energizer also makes Odyssey as well that I know for a fact.