The difference is that they have more than one Skyblock inspired mode. They offer the original Skyblock mode as well as Skywars like the Hypixel server and Skygrid. The Skygrid is made out of many different blocks to create a grid-like pattern that you have to survive on. The blocks include chests and mob spawners. Install a trading or chest shop plugin because going from one island to another is part of the fun! Consider allowing creeper explosions and Enderman griefing. Some of the best servers have this on and are hard, but fun. Note: A Skyblock has island protection options, including explosion prevention. Make a spawn.