Yup, SC is the superior game (IMHO) but both are very good and will be on my hard drive for a looong time to come. SC also has an entire WWII game included, which is incredible value for the money.
I have owned this game for 2 years and just fired it up for the first time a few days ago. (Trip to Pearl Harbor lit the fire). Let me get a handle on this game and I'll take you up. VERY impressed by how the AI handles the Japanese early in the game.