Yes, it’s just suites. There are two 1 BRs, two Ambassador Suites (2BR), one Presidential Suite (King Kamahameha Suite) (2BR), and the Honeymoon Suite, which isnt necessarily a suite, it’s a glorified single room. The 1BRs, King K suite, and the Honeymoon suite all connect so it’s technically possible to book them in various configurations.
They used to only be bookable by phone, but when Disney tinkered with taking suites out of the CL category and made them bookable last summer, many of the suites at various resorts now show up online.
Tonga guests have access to the Hawaii CL lounge and there is also a small/limited service lounge in the Tonga building (think very small). Tonga guests have historically had a room service menu where they can order select items from, free of charge, which is a unique attribute of the Tonga suites that you won’t see at other resorts.
Hope that helps!
that definitely does help, I will refer back to this when I win the lottery and can actually think about booking there. In the meantime I will stick with "regular" club level and hope for the AP discounts to return for this fall. We have a reservation for mid-november standard view and hope to swap for club level.