What are the differences in heat level and flavor profile between serrano peppers and jalapenos?

Serrano peppers are hotter and have a more intense flavor compared to jalapenos. Serranos have a Scoville heat rating of 10,000 to 23,000, while jalapenos range from 2,500 to 8,000. Serranos also have a more vibrant and grassy flavor, while jalapenos are milder and slightly sweeter.