My wife and I got away late last month for a vacation to Southern Italy’s Amalfi Coast. I was taking some time off but couldn’t help making a few casual beverage observations.

First, when it comes to carbonated soft drinks, Coca-Cola appears to dominate the region. From the small local market near our Airbnb rental in tiny Conca dei Marini, to the trendy restaurants in mid-size Sorrento, there was always a Coke for sale. We didn’t stumble on a Pepsi until we hit a market in the much larger city of Naples.

While this was no formal survey, the disparity actually makes sense to me, knowing something about Coca-Cola’s and PepsiCo’s global strategies. PepsiCo’s global beverage expansion strategy has historically focused...