It's not a matter of harder to fly because both are easy. But having experienced both I'd say that the PA28 is the "least unpleasant." The PA28 is also easier to operate as you have restrictions with payload and fuel. But I think you'll find that virtually any aircraft that you and I get to fly will be pretty easy - if you have been taught properly and don't ask it to do things that it was not designed to do.
PM