The difference is very clear. A vinaigrette consists of a mix of oil and acidic vinegar sometimes used as salad dressings or marinade. In contrast, dressing is a more general term like a sauce, usually cold, and can be used to coat the top of salads and cold vegetables. You can tell you’re making use of vinaigrette from the feel. It has a lighter texture and is runnier, while the other is thicker. In summary, vinaigrettes are lighter, shinier, and runnier, while salad dressings are thick.