Similar thing with orange juice. The producers add 'flavor packs' to adjust the taste for different regions of the US.
My son and I travel all over the US for various competitions, and there are certain regions where he refuses to get OJ because of the flavor differences.
I never looked into why, but when I moved from Boston to Seattle, I noticed dairy products (milk, cottage cheese) tasted different in Seattle. Confirmed it again when I moved back to Boston.
What you feed your cattle change how their milk taste; where I live there's a noticeable different between summer (where cows graze on alpine meadows) and winter (hay) milk.
My son and I travel all over the US for various competitions, and there are certain regions where he refuses to get OJ because of the flavor differences.