I enjoy both for plinking and target shooting, but the HW75 has a small edge for a couple reasons.
1. The HW75 has very, very slight felt recoil, while the P1 has a small amount. Of course this is one reason I like the P1. I need to keep in mind all the basics to shoot the P1 well, so it's good practice. The HW75 takes less concentration.
2. The cocking of the P1 is less comfortable to me when cocking. It needs pressure upon opening, while the HW75 needs pressure to close the action.
To me the differences are small, so I'm keeping both.