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While the actual pieces of chocolate may be bigger in Chocolate Chunk goodies, there are fewer total pieces. Yet in Chocolate Chip treats the pieces may be smaller but there are a larger number of them to be dispersed throughout the item. When I eat a Chocolate Chip cookie, I get what I want - chocolate in every bite. You're not as likely to be afforded that luxury with Chocolate Chunk.
So, to spare you the chocolate-less bites: chunk the Chocolate Chunk.