When Nike Run Club wins
You want audio guided runs and a polished app, and you already use Nike's apps.
Being talked through a run teaches you what different efforts should feel like. And the plans are free.
When Run-R wins
You want a plan with no sign-up, and exact paces from your own race time. Or you would rather have your sessions in your own calendar than in another app.
Run-R also keeps the plan right as you go. A new race, missed time or a new race date re-plans the weeks ahead.