The brighter nova blinds and makes the ensuing darkness all the darker. The ember glows amid the darkness and gives constant hope to those groping in the dark. A waypoint, a place for other embers to gather and together become greater than the nova.
But who is to say the nova was the last thing left? It left it's mark for everything else to see, as an inspiration for everyone else to reach towards. Meanwhile, the ember is the last of the fire. alone, dwindling, gripping onto whatever life it could find, but eventually fades away.