Roberto and Chris are at the same place. I think it's their FD's which are before Frank's. I think they are using a bunch of Pearl Resorts: Ta'ha, Bora Bora and Moorea to house the guys.
I think the pictures of Roberto in bed at the Nui, and Chris in the same shirt he's wearing above but at the Nui, are taken on the same day they meet her parents, but are taken in her suite or some other suite. I'd be surprised if either stayed there.
Lots of the same color wood in the rooms and the same kind of wooden posts as Ta'aha.
Pearl resorts are also the only ones with these fenceposts we see at Ta'ha and with Chris and they all have them: