I have to disagree
CTP and CTP2 have far more depth than the Sid Meir civ games. They are not exact clones of the SM games, therefore many people do not like them. There are many positives to CTP over Civ3, and vice versa.
Advantages of CTP2 over Civ3:
-far more elaborate tech tree
-more units to choose from
-Public works: does away with having to manage hundreds of workers, and gives more of an empire feel instead of "city states"
-Ctp2 compared to Civ3 is almost infinitely modable (Check out the Apolyton CTP2 modding section
)
-The availability of more stealth units (slavers, clerics, corporate branch, spys etc.)
-Greater number of civs to choose from
-greater number of governments to choose from
-Sea cities in CTP an CTP2, and Space cities in CTP
This list can go on and on, but many things boil down to a preference issues
Don't get me wrong however, Civ3 is an excellant game, and has benefits over CTP2 in most namely strategic resources and the diplomacy model. However, as I've already stated, many of the things that are good about Civ3 are currently being or have already been modded into CTP2. Oh and both CTP and CTP2, came shipped with multiplayer (it's sometimes buggy, but that is easilly fixed through modding
)
The main drawback of CTP2 is the weak AI. The out of the box AI is a pushover. Therefore it is imperative that mods be downloaded, there are several excellant ones to choose from which change the game ranging from very slight(ie Fixing the AI) to the extreme.
Also CTP1 and CTP2 can be found in the bargain bins. Best $10 that you'll ever spend