The AI builds boats but does not use them frequently or for invasions.
The AI can seemingly still overbuild and sacrifice research to pay maintenance. The Doviello can do it early game, unsurprisingly, and a few others do it when entering the endgame.
The AI builds big armies, often with a mix of units, but it could definitely still be better. Expect a big stack of tigers to visit you soon!
The AI uses magic a little more.
The AI will build rituals and more wonders.
It is still possible to dominate the Sons of Inferno, you just have work a little harder to do it.