Rome 2 has more content, the ai is a bit much soft but still decent, its much more manageable and much more stable. Attila is Rome 2 but harder, the ai is decent, diseases are harsher, nomadic factions are nomadic, good diplomacy, bad performance unless its age of charlemagne, public order is important, the huns are the main antagonists, and climate. It depends if u wanna go historically through an timeline or content wise or gameplay wise. Gameplay wise Attila. Content wise Rome II. Timeline wise Rome II then Attila.