Why is there another series on the schedule? Read this article.
The gist is, more manageable routes, but self-supported.

This is a night start 200, revisiting the classic route out to Stave Lake and finishing Downtown.

Not too hilly, well lit at night, lots of options for resupply.
It's not actually the flattest 200 (that's the early bird 200 or fall flatlander!) but it's very doable.