When comparing agar.io vs Slither.io, the Slant community recommends Slither.io for most people. In the question“What are the best browser-based multiplayer games?” Slither.io is ranked 1st while agar.io is ranked 11th. The most important reason people chose Slither.io is:
Anyone can play but if you want to get far you have to spend a lot of time on it.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Deep gameplay
While looking overly simplistic there is a good bit of strategy to the game as players can split their cell in order to confuse or surprise attack foes as well as spit out excess cells in order to change ones size.
Pro Players can customize their cell
For those that register for the game they can customize their cell in order to have specific words or even use pictures. This allows one to stand out in the game and other players may take notice if you are often playing.
Pro Fun and addictive
The mechanics of navigating the screen area aren't all that easy to understand, so it's as much about figuring out the limitations of the board as it is about running away from the big guy.
Pro Simple to get into hard to master
Anyone can play but if you want to get far you have to spend a lot of time on it.
Pro Short game
You can play for 5 min and then just quit.
Cons
Con Random respawns can lead to instant death
The game often sees players respawn right next to a large enemy which leads to them instantly dying, this can be frustrating when it happens a lot to a player.
Con Can't spawn where you want
Con Not a lot to do other than eat, eat, eat
There is not a lot to do so this will not be for everyone.