In a bit of a surprise announcement, Atari recently came out to state that RollerCoaster Tycoon World will be leaving Early Access on November 16. While that date alone isn't anything special, its significance lies in the simple fact that its the day before Planet Coaster's launch! It appears we're going to have an all-out rollercoaster war ahead of us!
Then again, I have a feeling this little 'war' will be over before it even gets started. The reason I say this is because RollerCoaster Tycoon World has managed to achieve the nearly impossible task of getting a massively negative score on Steam, despite bearing the name of an incredibly popular and nostalgic series. But if you would like to form your own opinion, I would recommend you check one of the most recent gameplay preview videos:
To end all of this on a somewhat positive note, I can at the very least tell you that the price of the Standard Edition will be going down. Instead of the current Early Access price of $50, the new price is going to be a much more reasonable $35. Whether Atari is doing this out of the goodness of their heart or to be even more similar to Planet Coaster, I have no idea, but at the very least there you'll be able to save some money.
And speaking of which, I would recommend keeping your wallet tightly shut until both games are released and the reviews pour in. To do anything else would be downright silly given how both games are releasing at pretty much exactly the same time.