What is the difference between cast iron wok and carbon steel wok?

The difference between cast iron and carbon is steel is the percentage of carbon which is present in the alloy. For cast iron this is between 2.5%-6.67% and for steel this is generally lower than 1.9%. Due to these properties the cast iron wok generally spreads the heat more equally and maintains this temperature much easier than the carbon steel wok. Because of this, it takes a bit longer to heat up. The carbon steel wok heats up very fast and is preferably used when a dish does not need to cook very long.