Coffee connoisseurs can be extremely picky and finicky. In the US and many other countries worldwide, the Arabica beans are the most popular. In Europe and the Middle East, most people prefer the Robusta beans that produce espresso coffees.
In the US, many people flock to their local Starbucks (SBUX) for their caffeine fix. Others favor the coffee sold by Dunkin Brands (DNKN) or other coffee purveyors. I prefer the coffee at Dunkin Donuts as I find it smoother and tastier. Both SBUX and DNKN sell Arabica beans, but there is a difference in the products.