OK, I'll bite.
Please don't take this as directed at you personally, but there have been quite a few of these questions and my confusion continues.
According to your signature, you already play or are currently learning both these pieces. So, my question is, how can it be that you do not know which you find more difficult, if either? And how do you not know what technical challenges you face in tackling them?
I know the common answer is that people like to "compare notes", but to what possible end? If someone else has different challenges, they may find one or other harder in a different fashion to you. But what exactly does that tell you? What are you hoping to learn by the question?
Here endeth the rant. As I said, not specifically directed at you, though the questions are ones you might consider answering.