I went to Wegman's over the weekend, which, as usual, was an insane asylum. The prices look about the same, with FD being slightly higher for some items. I didn't check prices for non-fresh groceries, such as cereal, which we buy at Costco.
The meat prices at FD looked a bit higher, but the quality was much better. However, I noticed that FD carries a lot of organic or non-hormone meat which raises the prices substantially.
I'm going to be on the busy side next weekend, so I might place another order for fruits and veggies.
As for planning - well, if you live in the city with the myriad of options for getting food, you are more likely to shop daily or every few days. I shop on the weekends, so I have to spend the time anyway. For the supermarket, it's walking the aisles, for FD, I can do it from my chair at home.
But the prices ARE higher for those of us not paying Manhattan prices.