1. Seafood Soy Sauce is a seasoning made from soy sauce, with seafood and other seasonings added. It has a darker color and a stronger flavor with a seafood taste and aroma.

2. Soy sauce is a soy sauce made from soybeans, wheat and salt through fermentation and extraction. It is lighter in color and relatively light in flavor, and does not have as strong a flavor and aroma as seafood soy sauce.