The main difference between Chow Mein and Lo Mein is that the Chow Mein is a fried noodles and Lo Mein is a Food
Chow mein (and , simplified Chinese: 炒面; traditional Chinese: 炒麵) are Chinese stir-fried noodles with vegetables and sometimes meat or tofu; the name is a romanization of the Taishanese chāu-mèn. The dish is popular throughout the Chinese diaspora and appears on the menus of most Chinese restaurants abroad. It is particularly popular in India, Nepal, the UK, and the US.
Lo mein (simplified Chinese: 捞面; traditional Chinese: 撈麵/撈麪; Cantonese Yale: lou1 min6; pinyin: lāo miàn) is a Chinese dish with egg noodles. It often contains vegetables and some type of meat or seafood, usually beef, chicken, pork, shrimp or wontons. It can also be eaten with just vegetables.
Traditionally this is a dry variation of noodle soup. The soup is simply separated from the noodles and other ingredients, and served on the side.