Absolutely, Zegras is different. The curves might be quite close actually, pretty similar idea, but the blade shape and lie are quite different from each other. Pro gave the retail P46 the pattern name PRO4466. It looks to be available on the OG lines, albeit sold out at the moment if you're a lefty.
PM9 is 5 by Easton scale, 4 old Warrior, 5.5 CCM. That's where it got confusing. CCM had the P28 and P46 out at the same time for a while and labeled the P28 lie 5 because that was the mistaken convention, while P46, because they were the only ones offering it, they measured it according to their system and slotted it at 5.5. Side by side, it's clear as day the P46 is lower. I love the P46, there's just enough loft but not too much, the heel is rockered as well as the toe, making it a bit more forgiving than the P28 at the extremities. Ideally I'd definitely flatten the heel curve, almost completely, and potentially alter the toe rocker and toe shape.