I have only watched Squid Game, so that's my answer. And I don't like scripts with zombie apocalypses anyway.

Personally, All of us Are Dead was more intense so I didn't know who would survive unlike Squid Game where it was clear only the main character would live.

However? No scene from All of us Are Dead hits like the red light, green light scene from Squid Game.

Both are great, but I still prefer Squid Game. I feel that Squid Game has more deep and well-written characters. And I think that Squid Game was more efficient in delivering the message of the series. I also have a personal preference for death games over zombies, although All of us Are Dead was excent for me who is not used to this type of show.

Both were very intense and fun to watch. But as Romeo mentioned, Squid Game has memorable moments like the Red Light, Green Light game. Although my favorite was the Tug-of-War game. The cliffhanger at the end of Episode 4 was what convinced me to binge-watch the rest of the series in a single day.