JWT or Standard Cookie strategy for Auth to serve MERN app?

Hey Fellow Campers!

So i m developping my first MERN app and i have implemented a simple cookie based strategy to serve the REACT client Webapp.

(I nest the client in one of the subroutes to avoid serving directly from the signup process, so my signup/login page is a completely separate entity from my React web app)

Any merit on using JWT with session over simple cookie based auth?