Adventure Time Simon and Marcy Comics and Fionna and Cake Conclusion Difference

Adventure Time Comics - Simon and Marcy

Simon (with the help of his adoptive daughter and her friends) successfully restored Betty

Having Simon and Betty get to live happily ever after

Adventure Time - Fionna and Cake

Simon was unable to restore Betty's human-self

However, he finally accepted and let go after so long. The two finally say their final goodbyes