Besides the obvious similarities, here are some key differences between Treasure Fleet and Colonization:
- Supply system: units cannot explore indefinitely as they consume supplies each turn. They must visit a colony or ask native villages to restock. Care should be taken when planning long expeditions.
- Small tech tree: once you establish the first colony, a tech tree with random bonuses becomes accessible. Also an unique unit type - naturalist - can speed up research.
- King's missions: from time to time you receive random missions from the king, which range from delivering a quantity of goods in Europe to discovering new lands or finding lost expedition.
- Economic system: the colony production is quite different from Colonization, maybe more similar to the one in Imperialism II
- Automatic production: colonies can be set to produce desired goods using checkboxes to minimize micromanagement.
- Optional independence: you are not pressed for independence, you may follow this goal only if you want to.
- Unit types: not all ships are available at the start of the game, new ship types appear in time as it happened historically.
- Disasters: tornadoes, droughts or plague can hit your colonies, ships can run across reefs or suffer mutinies.
- Pirates: soon after the New World is colonized, pirates as a separate faction will start to roam the seas.
- Veteran units: miltary units and ships gain experience with combat, which is represented in game with a number of stars.
- Artillery: there are two artillery units - cannons, and the more expensive mortars, which are very useful when fighting sieges.
Just curious, since you seem so adamant to get people to buy Treasure Fleet; Are you affiliated with the developer or publisher?