Boysenberry is a large, juicy, and glossy fruit that is slightly related to the North American blackberry. Boysenberries are known to be a cross-section between raspberry, loganberry, and blackberry. On the other side of the coin, blackberries are usually considered to be the real and genuine berries, and they are sweeter and smaller than the boysenberries.
The boysenberry has a round shape like that of marble, while the blackberry has a kind of shape that looks like a pine cone. Talking about their distinct colors, blackberry is seen to be of pure black color, while the boysenberry is observed to come with a tint of purple. When comparing the seeds, the blackberry seeds are larger, while the boysenberry seeds are smaller.
The boysenberry fruits are known to have more nutritional value than the blackberry fruits. The former is also considered to be more fragile than the latter. Boysenberries take a horizontal pattern of growth, while the blackberries are known to grow in a more vertical and straight manner.