200 pop cap for every mode (at least non-campaign, still haven’t checked that). Single player skirmish against AI, multiplayer against humans (unranked included), multiplayer against AI/mixed… all have a 200 pop cap. And as far as I’ve seen, it doesn’t matter the amout of players (will check biggest map with few players next time).
Also, the game setup options are basically the same as in the stress test. Still no player color selection, for example.
What can I say, 200 pop cap without the option to change it (at least for unranked matches) is a shame in my opinion. Especially when we can do it in Age of Empires II Definitive Edition. I understand the limit for ranked, but the rest? Just let people play how they want.