The main difference between mild and medium salsa is the level of spiciness. Mild salsa has a milder, less spicy flavor than medium salsa, which has a bit more heat. Mild salsa typically contains a blend of tomatoes, onions, peppers, and spices, but with less chili peppers or hot sauce than medium salsa. The heat level of mild salsa is usually quite low, making it a good option for people who prefer a more mild flavor or who are sensitive to spicy foods. Medium salsa, on the other hand, typically contains more chili peppers or hot sauce than mild salsa, giving it a bit more heat and a more complex flavor profile. Some people find medium salsa to be just spicy enough to add some flavor and heat to their dishes without being overwhelming, while others may find it too spicy. It's worth noting that the level of spiciness can vary depending on the brand and recipe of salsa, so it's always a good idea to check the label or taste a small amount before using it in a recipe. If you're not sure which one to choose, you can always start with mild salsa and add more spice to taste.