I think though in the case of armoured helo vs armoured helo it comes down to who fires first. Also armoured helos are not really designed for hunting each other as the main mission requirement.
Well I didn't mean that literally.
I should've been clearer. I mean the WZ-10 does not equal to AH-64 since it had less capability compared to the AH-64 because it's a lighter chopper.
If it really is a Helo vs Helo combat I think the WZ-10 might actually win.
Since PLA choppers (Z-9, Z-19 and Z-10) are designed with air to air capability (I don't know why would they do that, chopper vs chopper combats are extremely rare) and although hellfires are capable of hitting aerial targets, it wasn't designed to do that.