Both EES and Plexaderm are serums that are meant to help under-eye puffiness and reduce the appearance of crepey skin and fine lines beneath the eyes. However, from my personal experience, I've found that EES tends to be gentler and less irritating for the sensitive under-eye area. It's essential to remember that individual preferences may vary, so it's important to experiment and find out which product works best for your specific needs and skin type.