Jul 28, 2018· Acai Berry vs Blueberry – Superfood Showdown Published: July 28, 2018. Acai berries are the fruits of acai palm trees, which are mostly grown in Brazil's Amazon rainforest. Blueberries, by contrast, grow in many places around the world. Both acai berries and blueberries are known for their high antioxidant content, and both have been dubbed ...