I had same experience.I did hit the zx5, mizunos jpx921 and taylormade p770 to a fitting.
the p770 was not even close to the feeling jpx921 and zx5 did offer.
the zx5 for me had abit higher launch.
sound wise the zx5 is abit more silence than the jpx921.
both felt amazing and i have to try both again Before i decide.
Ps. Sorry english is not my main language
P790 was like a rock compared to Z585 and JPX 921 HMP.
I found that the Z585 is softest, best feel, and most forgiving of the 3. The HMP had tightest dispersion and also felt good.
I’ll keep hitting the Srixon and Mizunos and probably end up with both lol