Assuming you are talking about Mexican salsas, salsa roja is usually spicier than salsa verde. This is because salsa roja typically contains more chili peppers than salsa verde. However, the level of spiciness can vary depending on the recipe and the type of chili peppers used. So, if you are looking for a spicy salsa, go with the salsa roja. If you want a milder option, go with the salsa verde.