No help, I’m afraid, but just a note for whatever it’s worth: I made the switch in the opposite direction last year.
That’s not a knock against Zotero, which I first used when it was initially released, and used on and off for years. That team does good work.
But over the years, my workflow changed, and the iPad became a big part of it. I never did find a good workflow for Zotero that played well with iPad (there were some third-party efforts, but all of them involved some hassle). Bookends plays really well with the iPad.
So, if the iPad is an important part of your workflow where a reference manager’s concerned, that’s something to think about.