More than meets the eye. I learned more than I want to know about Yuasa since my last purchase a month ago. Apparently, Yuasa's are activated at the Factory and then shipped to distributors in the US where they wait to be sold to retailers and then the end user. To translate the manufacture date code one has to contact Yuasa directly. My new Yuasa, I learned after the purchase, was activated 10 months prior and sat on a distributors shelf for that period of time. Not good. Yuasa reps say that the distributors are responsible for maintaining the charge on all shelfed batteries. Do you think the distributors actually maintain charges on battery stock on the shelf. I don't.
So, while the Yuasa battery may be made with better materials try to find out when it was activated - electrolyte added to battery - prior to your purchase.