Battery size affects the longevity also right?

My brother is using Century Marathoner on his Inspira manual and it's 3 years 9 months now and still good.

My City original FB battery died recently after 1 year 4 months. Funny thing is Honda SC checked the battery 4 months ago and said battery is 98%. Now I switched to Century Motolite. Shop did not have Marathoner. Don't know what's the difference.

I don't think it's fair to compare with conti cars as those batteries are huge and maybe 3 times the size of the one in City.

Other than size, I wonder if auto vs manual makes a difference?