I like Hayward. I think he is a nice player, but he absolutely is similar to Green. They are both kind of that 3rd/4th option type. The tier above quality starter, but below all-star level. 9-10 million players, who are always going to be a bit frustrating, but also can be very important on good teams.
I might like Hayward a little better, because he is younger, and because he is a better ball handler and passer, but overall the impact is about the same. I think with either of them, it all comes down to how much you are paying them. I would take either at $9 million a year. When you get much above that, I just don't like it.