Trying to decide who to use for provisioning. Anyone have experience with either? I don’t want the hassle of renting a car or taking a taxi, then spending hours shopping in person. Thanks for any suggestions.

We used the "spending hours shopping in person" option.
But you might take a look at this.
Gourmet Gallery

Moe's offers on-line provisioning. We used it this past June. It is not obvious on their web site but if you call them they will tell you have to access it. It worked fine. They called us a few days before our trip to review out of stock items and substitutions. These were minimal, but it was good to know in advance. They delivered right to the boat at the requested time.