For any who are interested. I assume the upper category means you get a 1 category upgrade.

"Warm greetings from Bora Bora,

The benefits you have as a Royal ambassador is a free upgrade to the upper category, a Late Check out until 4pm on departure, the mini bar beverage free of charge once a day (the whole mini bar beverage is filled once a day) if you are travelling with a travel agency or with a direct reservation. (If you are using points for your stay, all benefits are not guaranteed.)

We have 5 categories of villa:
Emerald villas have view on the hotel, and are close to the beach.
Sapphire villas have view on the lagoon, and are in the middle of the pentoon.
Diamond villas are further out, but not at the end of pentoon, and some of those have view on the mountain from the deck.
Diamond Otemanu have direct view on the mountain from the bungalow (we only have 6 of those)
And finally you have Diamond end of pentoon, which are further out (we only have 8 of those).

Should you need further information, please feel free to contact me."