As it turns out, IV was on PC Game Pass, so I got to try it out. Wasn't really my thing. It's one of those games where you click on a little person and then on a tree, and they become lumberjacks and start bringing wood to the village. I never really got into those. Looks like it gets pretty crazy by the end. Wouldn't mind watching someone play it--someone I know, not a YouTuber.
"They are both real time strategy game. But more people choose TW than AOE, I think that's because AOE is still the same game since they release it, they just improved the graphics. Meanwhile, TW became popular because of its dynamic and cinematic combat scenes. This is just me, but I think AOE can sometimes look boring.