At this point, it's either a matter of "religion" or which one you prefer based on research.
I love my ZF pieces, other than Omegas (which in my collection are all from VSF). But when I hear "Omega rep", I turn into a loyal disciple of VSF.
Truth is, the ZF SMP is not a "wrong choice" in this particular case, just a different option that's as similarly / comparably good, but with different strengths and weaknesses.
I would choose ZF without hesitation if it had better availability - or just availability (VSF has had availability issues in the past)-, for example.