If it was me, my choice would be the Z7 based on what I think is the smoother draw bow and better feeling upon release. But, it's your hands that have to shoot it, not mine. Go with the one that feels "the without-a-doubt" the best in your own hands. Hopefully, this has helped, but for anyone to help you with this choice is like me asking a stranger how a particular shoe fits on their foot and me basing my decision on their results. Hopefully, I haven't come across the wrong way; it's not my intent�I just don't know any other way to put it.