FBA Vs. Amazon Merch: Which is a Better Seller Program

You can sell on Amazon through different methods and some of the popular methods are FBA and Amazon Merch. Have you tried these methods, what's your experience like? Well, I have no experience with FBA as the program is not available in my location but I use Amazon Merch and I sometimes make sales, hence make money. Amazon Merch is a free program where as FBA has some fees attached to it.