Hawkmoon is still by far way better. I outgun every thorn user because my 2nd shot is off before they can think about firing the 2nd. No 2nd shot means no dot which means no kill. They keep coming back for more and it makes it even better.
Most and I do mean most handcannon users do not know how to use the max rate of fire on handcannons anyways. But the hawkmoon is still far more superior. The range, the lucky bullets, ttk is quicker. Don't get me wrong thorn is a great handcannon. I would definitely have to go against the best gun for pvp as well. I would have to say maybe the 3rd. Hawkmoon being the first, suros being the 2nd.