What's the difference between Spartan Sprint, Super, Beast, and Agoge?

Distance and, in general, extremeness.

Spartan Sprint  5+ KM / 20+ OBSTACLES

Spartan Super 13+ KM / 25+ OBSTACLES

Spartan Beast 20+ KM / 30+ OBSTACLES 

Spartan Ultra  50+ KM / 60+ OBSTACLES

Hurricane Heat is minimum 4 to 7 hrs hard group workout

HH12HR is minimum 12 hrs hard group workout

The Agoge is minimum 60 hrs extreme race

Spartan KIDS Race is for 4 to 14,9 years old kids.