I've been using a LightOn headlamp and tail lamp on two bikes for a few years and recently added an Edelux. The Edelux has better distance illumination that I'm starting to appreciate. If I was going for one headlight the Edelux with near field illumination would be it. Haven't A/B compared the Edelux to Supernova.
Having a tail light that can be turned on anytime is worthwhile.