Scatter lake terrain is very hilly, it has one mediem water mass (arid has a fairly large one) and many other smaller lakes. There is a pack of boars to eat along with shore fish. In arid there is a high chance you will be stuck on an island in the lake causing you to biuld a navy.
The AI works well, but sometimes when they are on an island they take a while to biuld transprts. Scatter lake is especialy fun with destroy the wonder.