it's always hard to tell if more $ gets more product. I have been burnt many times making the assumption that a company who gained a great reputation when they started out, continued making a good product. What happens is the marketing
and accounting dept's crunch numbers that lead to decisions to save a few cents on each item and then the quality goes away.... but the public doesnt know that! This could even apply to the term "golfcart battery". Originally the golfcart battery
was meant to be charged at night and heavily drained all day.... a true deep, deep cycle situation. As such, the plates had to be really thick. Of course now day's, a manufacturer might have picked up on the fact that the consumer likes to use "golf cart" batteries in boats. so for all we know they are just labeling 6 volt batteries as GC batteries!
"...plus they are built better to withstand abuse and vibration."
I cant imagine a displacement
having to absorb more vibration and jarring than a car or truck battery...
If one wants to compare batteries I would say weigh them. It's all a matter of how much lead is in the plates.....