Hi. I would like to ask if you have had ever played a 150 turn game against the A.I and how was you experience? How does the game pace feels? Do you have enough time to expand to new world and your empire in general? Does it matter to develop science production as much? Is it harder to beat the A.I in higher difficulties, since you have less turns to play and they get huge early advantage? Do you recommend me any world settings to play a quick game?

Until now i have only played normal games(with 300 turns), and i can say that, after modern era, i am ahead of the second player by miles, so the games get boring in the middle of it around turn 150. For that reason i am looking to play quicker games, however, how does that influences my enjoyment of Humankind?

I know that i can play in a higher difficulty for more intense games but, from empire to civilization, it is to big of a leap, at least for me.

150 turns is the most usual format for multiplayer (due length)

the game is 2 times shorter, but everything is like 2 times cheaper, so you should be as capable to do everyting as in 300 turns game

technically the most affected thing is unit movement, they don't get double speed

Well if you are just talking about pacing after experimenting a bit i can confirm fast actually works really well. 

Since you explore with military units which are 2x cheaper to build you can build them much earlier. And if like me you like going for norse or lighthouse of alexandria you can get those 2 times earlier as well. So yeah the mid game exploration seem to work fine, since you get get your units and techs that let you explore much earlier.

And as far a difficulty goes i can also confirm at least on Humankind Diff, it does get much harder the faster the speed is.

However one reason i dislike fast is that you pretty much have to reroll a lot to get a good start, cause the AI can pick its culture really fast in the neolithic.. 

Yeah so it turns out in the new patch they're going to balance the AI's a bit so now you won't have a stronger AI on fast games. >.<