I used to love Banrock Station Shiraz and Cab in boxes in Hong Kong but here in the US their box wines are just drinkable. Don't know why.
Different wine (deliberately so). I hate this practice by some of the larger companies, using the same brand name and labeling for a deliberately different tasting product. Part of their global brand strategy. The theory is to cater to local tastes but have a global brand. Just tastes different wherever you go.