Masters in Marketing or Human Resource Management ? Got accepted for both?

If you really don't know, then more research isn't going to help. You need to get out into the field, work for a bit in one or both of them, and decide whether you like it enough to make it your career - or whether you need something else entirely, like a general MBA. There are always opportunities for talented, dedicated employees in either field, but you won't know whether you're one of them if you have nothing but clroom experience to go on, and there's no point in racking up more debt until you figure it out.