I'm not sure why the "II" as I can't find mention of a Double Sensation I pizza ever being offered in Hong Kong. It might refer to the fact that there are two versions of the Double Sensation pizzas: the Beef Legend and the Seafood Sensation.
The Beef Legend has an inner ring topped with pepperoni, cherries, peaches, and tartar sauce(!), and an outer ring topped with beef, red onions, bell peppers, cherry tomatoes, and barbecue sauce.
The Seafood Sensation features an inner ring topped with shrimp, cherry tomato, red onions, bell peppers, and a dill Thousand Island sauce. On the outer ring, you'll find various seafood, scallops, carrots, cranberry, okra, bell peppers, red onions, and an orange mayo sauce.
It's like they raided the produce section of the supermarket and topped each pizza section randomly. Also, I'm not sure how the tartar sauce ended up on the Beef Legend rather than the Seafood Sensation.
The Double Seasation II Pizzas are available for a limited time at $215 HK (~$27.73 US) each.