How does these compare to democracy 3?
These games and Democracy 3 are as different as day and night, or sky and ground.
Democracy 3 doesn't have a map, it purely works in numbers and the UI presenting them. You don't have a defined military and no units, all you have is the control of military budget. And thus there is no warfare in the game, only terrorist attacks. Your population is completely fixed and never rises or falls, it only changes in percentage (for example percentage of farmers decline by 4% and percentage of socialists and immigrants rises by 4% etc.). And it is not a simulation either. Some policies/situations and their results just don't make sense and have to be modded hard to be more realistic The political system is heavily biased towards the government system of a few nations in Europe and Americas and doesn't reflect the whole world at all. There is no parliament, you are free to enact arbitrary policies as long as you have 'political mana'. This isn't realistic. You have a fixed cabinet of 5-6 ministers, even though a real cabinet can be larger than 60+ in some large nations. There are only two parties, and this is the biggest downer for any remaining hint of realism (heck, even PRC/mainland China has multiple parties despite being a one-party dictatorship). The game has a plethora of other problems.
And in the end, your only goal is to get reelected and not bother about how your nation is doing. Your only goal is to get public opinion higher and higher and you don't give a damn if your nation is sinking fast. In the other games, you have to focus not just on getting reelected but also on building your nation up and clearing debts and inducing stability, so that your base is actually decently strong and not fall down like a castle of cards when you take power.
Besides, once you reach the optimal setup there is nothing to disrupt your game. Got out of debt and enacted some right policies that reduce problems somewhat? Congrats, now you have 90% population support and you can just keep pushing end-turn button and nothing bad will happen, problems will somehow automatically fix themselves and you'll be infinitely reelected. This is fun for maybe a game or two but becomes really boring afterwards.
It can be a very enjoyable game at times, but it can never be called deep to keep you engaged for too long. And it is certainly not a real simulation. And it can be ridiculous because it doesn't have much real-world mechanics, and it works solely on the lines of UK and USA and represents other nations like crap, nothing more. It is a good game considering it was a one-man project and the UI is clean and gorgeous, but still, it is not a realistic game and doesn't have many mechanics. If you buy it, buy it thinking of it as just a game and meant for playing only USA/UK/France, that way it will be enjoyable and not frustrating.
I guess there is no modern political simulation game that actually has some real quality gameplay.