As far as I know you won't appreciate PtW if you have not liked Civ3 because this is exactly the same game (3 or 4 new techs, a couple of new advances and wonders does not change a game to the point it can be considered a new experience)...
I have given Civ3 a try only to be disappointed by what I am now considering as the worst incarnation of Sid Meier's Civilization games (Alpha Centaury included).
Modded CtP2 is, IMO, the best TBS Game available. You should try the Apolyton Pack which is correcting most of the bugs of the original game and is adding a new dimension to the game as it becomes tougher and more interesting. Once you will be familiar with the Apolyton Pack, try Martin's GoodMod for the Apolyton Pack which uses an improved AI and improves some other concepts of the original game like Trade.
You already know the difference between CtP2 and Civ3 as you have played both games, the Public Work versus Workers issue is of course fundamental, but CtP2 is a very moddable game and I am sure you will quickly find the way (simply by using the file from the modders or learning how to mod the game) to transform your CtP2 into the best TBS Game in the world because you will have customized it to suit your needs and desires.