What are the differences between poblano peppers and pasilla peppers in terms of flavor, heat level, and culinary uses?

Poblano peppers are milder in heat compared to pasilla peppers, which are spicier. Poblanos have a rich, earthy flavor with a hint of sweetness, while pasilla peppers have a smoky, raisin-like taste. Poblanos are often used in dishes like chiles rellenos, while pasilla peppers are commonly used in mole sauces and salsas.