I'm still figuring it out myself but from what I understood the differences were that the Zeus Lightning address has a time limitation if the user is offline for more than 24-hours then the payment is returned to the sender. Where as the Minibits Lightning address doesn't. Also, the Minibits wallet can handle ecash along with sats seamlessly, which might be a plus if the user is into ecash. What I'm not so sure about is what happens if the mint operator's server goes down; the ecash is stored on the user's device and any user can run a mint themselves to connect with their client so I think it's easy enough to recover in the event a mint operator gets taken down. I went through the recovery process for good measure by funding the mint, uninstalling/reinstalling the app, and I am in fact in control of my keys/sats so I don't think it's custodial. I suppose a better test would be to restore in a different app altogether.