And some tweaks in fighting (promotions and such), and elaborate FF system.
But I agree, if I had to pick one over the other, it's this one. With the mods, you can create a game that can get pretty close to the old system. Plus, if you think of it, taking this as a stand-alone game, it's not so bad. The big problems is that it's not quite as intricate (hmm, maybe not the right word, but it's not quite as something) as Col 1, and it's not as long or advanced as Civ 4. Unfortunately, those are the 2 games it compares to most. It's still a decent enough game in its own right.