Bitcoin throws away roughly every block that isn't first. Two miners solve a block within seconds of each other, one becomes canonical, the other's work is gone. Kaspa keeps both, then orders them. Same proof-of-work security model, same fixed supply, different rule for what happens when two blocks land close together. That single change is what lets Kaspa run at 10 blocks per second instead of one every ten minutes without the network drowning in orphaned work. Same money. Different traffic rule.