I suspect both batteries are the same.. The clerk at Auto Zone does not know how to read the labels is all. He Read CCA as CA.
however if you want better, Check out DEKA or Trojan or Interstate instead of Duralast.. Likely all 3 can fit a higher capacity battery in the tray for you.
That said.. Duralast are made in mexico.. A company I'd not heard of before.
I'd go with Deka. East Penn battery company, US made of US lead. (And if you think I'm just saying that, Crawl under my rig and read the label on MY new starting battery,,, or house batteries.... Yup, I took my own advice)
Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times