Template:Isda premium EOD vs TE showdown summary

Events of Default vs. Termination Events showdown: why is there a difference between Events of Default and Termination Events, what is the difference, how will it affect me in practice, tell me more about this odd netherworld of Additional Termination Events, and is there a good way of describing both, or must I really stick with “an Event of Default or a Termination Event, as the case may be”?