They're both unique because they're both the first of their kind. And they were doubted for years before they were shown to have value and staying power. The co

They're both unique because they're both the first of their kind. And they were doubted for years before they were shown to have value and staying power. The copycats have a problem especially when they hype themselves to $40B market caps before they have even grown a sustainable ecosystem or fair distribution. The file storage chains like Filecoin, Sia, Chia, etc. may tick this box, but they aren't competing with Bitcoin or Ethereum. Any other unique proof of work algos that can't be easily hashed by ASICs or GPUs might qualify but I don't know. I don't see any others with a real grassroots ecosystem of activity.