This is a little self serving but I do get ask so here's just a few examples of the difference.
Most comedy classes will teach you how to write a joke.
The ComedyDojo guides you to an understanding of why and when to write a joke.
Comedy classes will show you how to use a microphone.
The ComedyDojo will show you how to use the entire stage.
Comedy classes attempt to teach you how to use energy to go out and get the audience.
The ComedyDojo will show you how to bring the audience to you.
*This has just been 3 examples. Comedy classes serve their purpose. They help out new people and they usually provide a stage to gain some experience. I applaud their efforts. In the ComedyDojo I do that as well, but I go in somewhat deeper. Just cause I know how and besides, I don't teach a class I coach individuals.