The main difference between the Vitamix Explorian Series E310 and the E320 model lies in the size of the container and the motor power:

- Container size:
E310: Has a 1.4 litre container which is ideal for small to medium portions.
E320: Has a larger 2.0 litre container, which is better suited for larger quantities.

- Motor power:
E310: Equipped with a 2 hp motor (approx. 1200 W).
E320: Has a slightly more powerful 2.2 hp motor (approx. 1640 W).

- Design and functions:
Both models offer variable speed controls and a pulse function, but the E320 has a slightly more modern design and can process larger quantities due to the larger container.