When I made this thread back in 2015 lots of people said these two are two very different games. However, as days have passed it is more and more evident that there are lots of similarities between these two in a good way. I have updated OP and made changes for a healthy discussion.
Horizon Zero Dawn:
Release Date: 02/28/2017
Genre: Open World Action / Role Playing Game (RPG)
Publisher: Sony Computer Entertainment
Developer: Guerrilla Games
Platforms: PS4 & PS4 Pro
Latest Trailer: https://www.youtube.com/watch?v=RRQDqurZJNk
The Legend of Zelda: Breath of the Wild:
Release Date: 03/03/2017
Genre: Open World Action Adventure Game
Developer: Nintendo EPD
Platform: Wii U & Switch
Latest Trailer: https://www.youtube.com/watch?v=zw47_q9wbBE
Comparison Video: https://www.youtube.com/watch?v=mztatc7IGFc
Metacritic: Horizon Zero Dawn (PS4 & PS4 Pro) > Zelda Breath of the wild (Wii U & Switch)
This is a bold claim. Zelda will certainly get an advantage being a long lasting popular IP. Plus development team has veterans making Zelda games.
On the other hand Guerrilla Game's games didnt got high critical reception. But they are hiring Witcher 3 developer to Fallout NV writer and many other to make it great. I think Horizon Zero Dawn will beat Zelda BoTW critic wise.
Sales: Horizon Zero Dawn (PS4 & PS4 Pro) > Zelda Breath of the wild (Wii U & Switch)
This is no brainer. PS4 is the king of this generation. Plus Sony will push their first party game. So sales wise this will be a piece of cake for Horizon Zero Dawn.
Graphics: Horizon Zero Dawn (PS4 & PS4 Pro) > Zelda Breath of the wild (Wii U & Switch)
From a technical perspective Horizon Zero dawn has already won the race. In terms of aesthetic of view Horizon Zero Dawn will also win. Zelda BoTW featureS a stylized cel shaded art style. And Horizon Zero Dawn uses an unique post apocalyptic world filled with robot dinosaurs and creatures. This depends on peoples taste. But overall Horizon Zero Dawn will win.
Discuss. I know VGC has a lot of Nintendo and Sony enthusiasts. So keep this civil.