MERN stack and Mean stack development are best at their own place. Though, MERN stack run on reacts which is more preferable than the Angular in upcoming future.
MERN stack development is one type of full stack development that can be considered as an alternative.
MERN is MongoDB, Express, Angular, and NodeJS.
Today there are so many options available for application development. Among all of them, MERN stack development is a good choice to work with because it is component based technology and isomorphic too.