I don't know unit numbers but the building configuration at Onshore is way different. There are separate entrances (lobbies), each with an elevator that serves two units. The 2BR unit we stayed was in the in the West Wind building and had a balcony at each end. One faced north, one faced south. The North Wind building being renovated -- lots of construction. I can't help with the other buildings or where units of different sizes are located. We were very happy with our unit in West Wind.
We were there Thanksgiving Week 2021, hardly prime time in Newport, but the seafood and chowdah are still superb. I'm retired Navy and spent time in Newport four or five times in my early career. Thus, we had access to the commissary to pick up fruit, etc. If you have access to the Navy Base, that's about the only thing useful there. The Officers' Club used to be a very popular hangout with a great dining room and lounge. Now it seems to be only for catered events like weddings. Today's modern Navy.
We got there late and had to check in at Inn on the Harbor. We're good at arriving late, even at places that are only two hours from home!