In fact, there is a difference between spring vegetables and lettuce. Spring vegetables can't be eaten raw, but lettuce can be eaten raw. We call it mixed because spring vegetables are sold in the market, and the color of lettuce is lighter. If you want to buy authentic lettuce, you can go to Metro Supermarket, which is twice as expensive as spring vegetables, but the products in Metro Supermarket are really good. My family lives near there, so it is highly recommended.